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CN108136687B - 袋成形设备 - Google Patents

袋成形设备 Download PDF

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Publication number
CN108136687B
CN108136687B CN201680059310.8A CN201680059310A CN108136687B CN 108136687 B CN108136687 B CN 108136687B CN 201680059310 A CN201680059310 A CN 201680059310A CN 108136687 B CN108136687 B CN 108136687B
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pair
bag forming
drive shaft
forming apparatus
arm
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CN108136687A (zh
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S·皮布尔斯
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KHS GmbH
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KHS GmbH
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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
    • 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
    • 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
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • 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
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B29C66/43121—Closing the ends of tubular or hollow single articles, e.g. closing the ends of bags
    • 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
    • B29C66/81465—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 behind the other in a single row in the feed direction
    • 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
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8221—Scissor or lever mechanisms, i.e. involving a pivot point
    • 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
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8226—Cam mechanisms; Wedges; Eccentric mechanisms
    • B29C66/82265—Eccentric mechanisms
    • 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
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B29C66/83221—Joining or pressing tools reciprocating along one axis cooperating reciprocating tools, each tool reciprocating along one axis
    • 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
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/843—Machines for making separate joints at the same time in different planes; Machines for making separate joints at the same time mounted in parallel or in series
    • B29C66/8432—Machines for making separate joints at the same time mounted in parallel or in series
    • 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
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/849—Packaging machines
    • 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
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/60—Uniting opposed surfaces or edges; Taping
    • B31B50/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure, e.g. by welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/14—Applying or generating heat or pressure or combinations thereof by reciprocating or oscillating members
    • B65B51/146—Closing bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/26—Devices specially adapted for producing transverse or longitudinal seams in webs or tubes
    • B65B51/30—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes
    • B65B51/303—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes reciprocating along only one axis
    • 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
    • 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
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8225—Crank mechanisms
    • 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
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824—Actuating mechanisms
    • B29C66/8246—Servomechanisms, e.g. servomotors
    • 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
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/924—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/9241—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force or the mechanical power
    • 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
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/924—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/9261—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the displacement of the joining tools
    • B29C66/92611—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the displacement of the joining tools by controlling or regulating the gap between the joining tools
    • 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
    • B31B70/642—Uniting opposed surfaces or edges; Taping by applying heat or pressure using sealing jaws or sealing dies
    • 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
    • B31B70/645—Making seals transversally to the direction of movement

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Package Closures (AREA)
  • Making Paper Articles (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)

Abstract

一种袋成形设备包括：布置在成形平面的相反侧的成对的相对的密封条；成对的引导臂，每个引导臂都从第一臂端部延伸穿过成形平面到第二臂端部并且承载成对的相对的密封条中的相应的一个；安装框架，成对的引导臂在第一和第二臂端部之间可移动地安装到安装框架；以及驱动轴，所述驱动轴连接到成对的引导臂中的每一个的第二臂端部，使得轴旋转可操作以移动成对的相对的密封条进入和脱开在密封条之间在成形平面中行进的袋成形材料带两侧的接合。所述驱动轴可相对于安装框架可平移以调节成对的相对的密封条之间的闭合间隙。

Description

袋成形设备
技术领域
本发明涉及袋成形、更特别地涉及用于密封制袋材料带的设备。
背景技术
当由各种膜形成囊袋或其它袋时，成形过程中的一个步骤通常需要在加热的密封条之间压制薄膜层以密封袋的一个或两个以上侧面或边缘。在工业规模的操作中，必须以相当高的速度处理连续的囊袋流，这需要密封条的频繁且精确的往复运动。用于在囊袋/袋成形过程中驱动密封条的设备的一个实例可以在WIPO公布的WO2012/031877中看到，其内容通过引用整体并入本文。虽然这样的设备已经有效地运行，但是可以进一步改进。
发明内容
鉴于上述情况，本发明的一个目的是提供一种改进的袋成形设备以及相关的装置和方法。根据本发明的一个实施例，袋成形设备包括：布置在成形平面的相反侧的成对的相对的密封条；成对的引导臂，每个引导臂都从第一臂端部延伸穿过成形平面到第二臂端部，每个第一臂端部承载成对的相反密封条中的相应的一个；安装框架，成对的引导臂在第一臂端部和第二臂端部之间可移动地安装到安装框架，使得分开第二臂端部的运动将第一臂端部移动到一起；以及绕轴线可旋转的驱动轴，成对的引导臂中的每一个的第二臂端部连接到驱动轴，使得驱动轴的旋转可操作以移动成对的相对的密封条进入和脱开在密封条之间在成形平面中行进的袋成形材料带两侧的接合。
根据本发明的一个方面，驱动轴相对于安装框架是可平移的，以调节成对的相对的密封条之间的闭合间隙。根据附加的方面，所述设备还包括成对的直线支承轨道，每个直线支承轨道将成对的引导臂中的相应的一个可滑动地连接到所述安装框架。
附图说明
基于附图和优选实施例的以下详细描述，将认识到本发明的这些和其它目的、方面和优点。
图1是根据本发明的一个实施例的袋成形设备的透视图；
图2是图1的袋成形设备的侧视图；和
图3A和3B是图1的袋成形设备的透视图，其驱动轴分别在工作位置和非工作位置之间转换。
具体实施方式
参考图1和图2，袋成形设备10包括安装框架12，成对的引导臂14可移动地安装到安装框架12。绕轴线20可旋转的驱动轴16连接到引导臂14以向其施加往复运动。引导臂14被配置成能够承载相对的成对的密封条22(参见示出了安装到引导臂14的密封条22的图3A、3B)，密封条22移动进入和脱开在密封条之间在成形平面中行进的袋成形材料带两侧的接合(进入和退出图2中的页面)。如本文所使用的那样，术语“成形平面”被限定为通常表示袋成形材料带在通过袋成形设备的密封条之间时所沿其行进的平面。
安装框架12优选由多个互连的框架元件构成，并且使得设备10能够与附加的袋成形和填充机成直线地安装。多个引导臂开口26被限定在安装框架12中以使得引导臂14的一部分能够延伸穿过引导臂开口26。在所示的实施例中，直线支承轨道30附接到安装框架12的下表面，引导臂14可滑动地悬挂在所述直线支承轨道30上。可以采用替代的安装装置来将引导臂14与安装框架12可移动地连接。例如，引导臂14可以围绕枢转支承件等可枢转地安装，或者经由平行连杆机构安装。
引导臂14分别在承载密封条22的第一臂端部32和连接到驱动轴16的第二臂端部34之间延伸。重要的是，引导臂14通常为“S”或“Z”形，使得它们在第一与第二臂端部32、34之间延伸穿过成形平面24。在第一和第二臂端部32、34之间可移动地安装到安装框架12，移动引导臂14中的一个的第二臂端部34远离成形平面24将因此使同一引导臂14的第一臂端部32朝向成形平面24移动。同样地，通过同时移动分开密封条22的相应的引导臂14的第二臂端部34来实现将相对的密封条22移动到一起。
与安装框架12一样，每个引导臂14可以由多个互连的臂元件形成。而且，每个引导臂14可以被配置成能够承载多个密封条22并且在多个点处连接到驱动轴16。在所示的实施例中，引导臂14通过驱动连杆机构36连接到驱动轴16，这有利地促进了驱动轴16相对于安装框架12的平移运动，下面将作更详细的描述。
每个驱动连杆机构36在第一连杆机构端部40处可枢转地连接到第二臂端部34并且在第二连杆机构端部42处可枢转地连接到驱动轴16。在第一连杆机构端部40处，枢转销等实现到第二臂端部34的连接，并且第二连杆机构端部42形成围绕驱动轴16的套环。优选地，连杆机构36的长度是可调节的并且可以附接不同尺寸的套环。
驱动轴16包括多个相反定向的凸轮凸部44，第二连杆机构端部42围绕所述凸轮凸部44安装。凸轮凸部44相对于轴线20的最大偏移和最小偏移之间的差异决定了密封条22的行程长度。为了改变行程长度，可以在驱动轴16上安装具有更大或更小偏移的凸轮凸部，对应地重新配置第二连杆机构端部42上的套环并调节驱动连杆机构36的长度。
旋转驱动器46连接到驱动轴16以向其施加旋转运动。结合本发明可以采用各种类型的旋转驱动器46，包括伺服驱动器、直接驱动器、步进电机等。有利地，引导臂14的连接配置使得能够使用单个驱动器46和驱动轴16来移动两组引导臂14和相对的密封条22，以及使用单个方向上的连续的旋转运动。通过改变转速(例如，通过在密封条22接合时减慢转动)，可以实现可变的密封时间。此外，相对的密封条22的运动是机械地设定和同步的，从而避免了通过对一组或两组密封条22进行过度或不足的驱动而可能导致的损坏或不足的密封。
在密封操作期间，当凸轮凸部44向第二臂端部34呈相反的最大偏移时密封条22“闭合”，使得密封条22将在密封条之间的位于成形平面24中的袋成形材料带两侧接合，当凸轮凸部44向第二臂端部34存在相反的最小偏移量时，密封条22“完全打开”。因此，完全打开的分离距离与密封条行程长度成比例。在所示的实施例中，引导臂14直线地移动，完全打开距离大约是行程长度的两倍。一般而言，较小的完全打开距离允许更快的操作和更好的机械优势来施加密封压力。另一方面，当这种袋成形材料的运动在操作过程中停止时，较大的完全打开距离防止了由于热密封条的接近导致的袋成形材料的过热。当相对的成对的密封条之间的距离很大时，密封条的维护也很方便。
如上所述，驱动轴16可以相对于安装框架12平移。参照图3A，驱动轴16被示出为处于工作位置，其中处于闭合位置的相对的密封条22之间的距离大约为零。在图3B中，驱动轴16已经相对于安装框架12平移离开工作位置(优选地经由平移驱动器)。尽管凸轮凸部44处于与图3B中相同的定向(即对应于图3A中的闭合位置)，但平移使得第二臂端部34与成形平面24之间的距离减小，由此增加了相对的密封条22之间的间隙。如本文所使用的，术语“闭合间隙”是指当驱动轴针对密封条之间的最小间距定位时，相对的密封条之间的距离。在所示实施例中，图3A的工作位置中的闭合间隙大致为零，而在图3B的非工作位置中，闭合间隙为更大的距离，既大于工作位置中的闭合间隙，又大于零。
可平移的驱动轴16有利地使得能够实现具有较小的完全打开距离的益处(例如，较高速度的操作和较大的密封压力)，同时仍然使得能够在必要时由于袋成形材料的行程中的故障以及当有助于维护时自动实现完全打开距离的显著增加。应理解的是，平移的优点是由驱动轴16和框架12以及附接的引导臂14之间的相对运动引起的。移动驱动轴16以实现这种相对运动代表了一个优选实施例，但它也可以在本发明范围内通过框架12和引导臂14的运动来实现。与旋转驱动器46一样，各种驱动器类型可以用于平移驱动器。在一个实施例中，两个驱动器可以使用同一驱动马达，其中传动装置用于在旋转和平移轴16之间转换。
优选地，如图所示，引导臂14和相关尺寸在成形平面24的相反侧近似对称，使得在工作位置和在从工作位置平移期间驱动轴16的轴线20位于成形平面24中。此外，在所示的布置中，第二驱动轴16和旋转驱动器46位于安装框架12上方，其中第一臂端部32和密封条22位于其下方。这方便为了清洁、维护和更换而接近驱动轴16和相关部件。而且，来自部分成形的袋或其内装物的任何异物在操作期间不太可能被引入这些移动的机械部件中。然而，应理解的是，本发明的特征可以应用于其它几何结构。
各种密封条22可以安装到第一臂端部32，并且可以为其进行任何必要的连接以用于加热、冷却、引入配件等。优选地，密封条22使用压力调节机构50(例如弹簧偏压螺钉)连接到第一臂端部32，压力调节机构50使得由接合的密封条22施加的密封力能够变化。在所示的实施例中，密封条22被定向为使得它们的长轴线是水平的，并且更特别地，密封条被配置用于施加作为水平囊袋成形过程的一部分的顶部密封。然而，应该理解的是，本发明的特征可以应用于其它方位和其它袋成形过程中的密封条。
前述实施例是为了说明性和示例性目的而提供的；本发明不一定限于此。相反，本领域的技术人员将会理解，对于特定情况的另外的变化和修改将落入在此示出和描述的本发明的范围以及所附权利要求的范围内。

Claims (19)

1.一种袋成形设备，包括：
布置在成形平面的相反侧的成对的相对的密封条；
成对的引导臂，每个引导臂从第一臂端部延伸穿过成形平面到两个第二臂端部，每个第一臂端部承载成对的相对的密封条中的相应的一个；
安装框架，成对的引导臂在第一与第二臂端部之间可移动地安装至安装框架，使得分开第二臂端部的运动将第一臂端部移动到一起；
绕轴线可旋转的驱动轴，所述驱动轴包括两对相反定向的凸轮凸部，成对的引导臂的两个第二臂端部中的每一个都与所述两对相反定向的凸轮凸部中的相应的一个相连接，使得所述驱动轴的旋转是能被操作以移动成对的相对的密封条进入和脱开在密封条之间在成形平面中行进的袋成形材料带两侧的接合；以及
成对的直线支承轨道，每个直线支承轨道都将成对的引导臂中的相应的一个可滑动地连接到安装框架，以用于朝向或远离成形平面的直线运动。
2.根据权利要求1所述的袋成形设备，还包括成对的压力调节机构，每个压力调节机构都将成对的相对的密封条中的相应的一个连接到成对的引导臂中的相应的一个的第一臂端部，当成对的相对的密封条在袋成形材料带两侧接合时，每个压力调节机构都能被操作以调节施加在袋成形材料带上的压力。
3.根据权利要求1所述的袋成形设备，其中，驱动轴能够相对于安装框架平移，以调节成对的相对的密封条之间的闭合间隙。
4.根据权利要求3所述的袋成形设备，其中，所述驱动轴能够相对于安装框架从所述闭合间隙大致为零的工作位置平移到所述闭合间隙大于零的非工作位置。
5.根据权利要求3所述的袋成形设备，其中，在所述驱动轴相对于所述安装框架的整个平移中，轴线位于所述成形平面中。
6.根据权利要求3所述的袋成形设备，还包括两对驱动连杆机构，所述两对驱动连杆机构中的每一个都具有第一连杆机构端部和第二连杆机构端部，第一连杆机构端部可枢转地连接到成对的引导臂中的相应的一个的所述两个第二臂端部中的相应的一个，第二连杆机构端部可枢转地连接到所述两对相反定向的凸轮凸部中的相应的一个。
7.根据权利要求3所述的袋成形设备，还包括连接到所述驱动轴以向驱动轴施加围绕轴线的旋转运动的旋转驱动器。
8.根据权利要求7所述的袋成形设备，其中，所述旋转驱动器与驱动轴一起平移。
9.根据权利要求7所述的袋成形设备，还包括平移驱动器，所述平移驱动器连接到所述驱动轴以向驱动轴施加垂直于所述轴线的平移运动。
10.根据权利要求1所述的袋成形设备，其中，成对的相对的密封条中的每一个都水平地延伸。
11.根据权利要求1所述的袋成形设备，其中，所述安装框架位于所述相反的成对的密封条上方，所述驱动轴位于所述安装框架上方。
12.根据权利要求1所述的袋成形设备，还包括布置在所述成形平面的相反侧的附加的成对的相对的密封条；
其中，成对的引导臂中的每一个都包括附加的第一臂端部，每个附加的第一臂端部承载所述附加的成对的相对的密封条中的相应的一个。
13.一种袋成形设备，包括：
成对的相对的密封条，其布置在成形平面的相反侧；
成对的引导臂，每个引导臂都从第一臂端部延伸穿过成形平面到两个第二臂端部，每个第一臂端部都承载成对的相对的密封条中的相应的一个；
安装框架，成对的引导臂在第一与第二臂端部之间可移动地安装到安装框架，使得分开第二臂端部的运动将第一臂端部移动到一起；
两对驱动连杆机构，所述驱动连杆机构中的每一个都在第一连杆机构端部与第二连杆机构端部之间延伸，第一连杆机构端部可枢转地连接到成对的引导臂中的相应的一个的所述两个第二臂端部中的相应的一个；
绕轴线可旋转的驱动轴，所述驱动轴包括两对相反定向的凸轮凸部，所述两对驱动连杆机构中的每一对的第二连杆机构端部可枢转地连接到所述两对相反定向的凸轮凸部中的相应的一个；
旋转驱动器，其连接到驱动轴以向驱动轴施加绕轴线的旋转运动，以移动成对的相对的密封条进入和脱开在密封条之间在成形平面中行进的袋成形材料带两侧的接合；以及
平移驱动器，其连接到驱动轴以向驱动轴施加垂直于轴线的平移运动，以调节成对的相对的密封条之间的闭合间隙。
14.根据权利要求13所述的袋成形设备，还包括成对的压力调节机构，每个压力调节机构都将成对的相对的密封条中的相应的一个连接到成对的引导臂中的相应的一个的第一臂端部，当成对的相对的密封条在袋成形材料带两侧接合时，每个压力调节机构都能被操作以调节施加在袋成形材料带上的压力。
15.根据权利要求13所述的袋成形设备，还包括成对的引导轨道，每个引导轨道都将成对的引导臂中的相应的一个可滑动地连接到所述安装框架。
16.根据权利要求13所述的袋成形设备，其中，成对的相对的密封条中的每一个都水平地延伸。
17.根据权利要求13所述的袋成形设备，其中，所述安装框架位于相反的成对的密封条上方，所述驱动轴位于所述安装框架上方。
18.根据权利要求17所述的袋成形设备，其中，所述旋转驱动器和平移驱动器均位于所述安装框架上方。
19.根据权利要求13所述的袋成形设备，还包括布置在成形平面的相反侧的附加的成对的相对的密封条；
其中，成对的引导臂中的每一个都包括附加的第一臂端部，每个附加的第一臂端部都承载所述附加的成对的相对的密封条中的相应的一个。
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