CN101204856B - 制作袋组件的装置和方法 - Google Patents

制作袋组件的装置和方法 Download PDF

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Publication number
CN101204856B
CN101204856B CN200710160335XA CN200710160335A CN101204856B CN 101204856 B CN101204856 B CN 101204856B CN 200710160335X A CN200710160335X A CN 200710160335XA CN 200710160335 A CN200710160335 A CN 200710160335A CN 101204856 B CN101204856 B CN 101204856B
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CN
China
Prior art keywords
die member
pipe
bag assembly
sheet material
welded portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN200710160335XA
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English (en)
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CN101204856A (zh
Inventor
M·A·维斯
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Covidien AG
Covidien LP
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Covidien LP
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Publication of CN101204856A publication Critical patent/CN101204856A/zh
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
    • A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
    • A61J1/05—Containers specially adapted for medical or pharmaceutical purposes for collecting, storing or administering blood, plasma or medical fluids ; Infusion or perfusion containers
    • A61J1/10—Bag-type containers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H9/00—Pneumatic or hydraulic massage
    • A61H9/005—Pneumatic massage
    • A61H9/0078—Pneumatic massage with intermittent or alternately inflated bladders or cuffs
    • A61H9/0092—Cuffs therefor
    • 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
    • B29C65/04—Dielectric heating, e.g. high-frequency welding, i.e. radio frequency welding of plastic materials having dielectric properties, e.g. PVC
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/72—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by combined operations or combined techniques, e.g. welding and stitching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/004—Preventing sticking together, e.g. of some areas of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • 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
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2422—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical
    • B29C66/24223—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical being oval
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • 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
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/244—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being non-straight, e.g. forming non-closed contours
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • 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
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    • B29C66/3452—Making complete joints by combining partial 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/347—General aspects dealing with the joint area or with the area to be joined using particular temperature distributions or gradients; using particular heat distributions or gradients
    • B29C66/3472—General aspects dealing with the joint area or with the area to be joined using particular temperature distributions or gradients; using particular heat distributions or gradients in the plane of the joint, e.g. along the joint line in the plane of the joint or perpendicular to the joint line in the plane of the 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
    • B29C66/348—Avoiding melting or weakening of the zone directly next to the joint area, e.g. by cooling
    • 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
    • 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
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends
    • 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
    • B29C66/61—Joining from or joining on the inside
    • B29C66/612—Making circumferential 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
    • B29C66/63—Internally supporting the article during joining
    • B29C66/636—Internally supporting the article during joining using a support which remains in the joined object
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • 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
    • B29C66/812—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8126—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/81262—Electrical and dielectric properties, e.g. electrical conductivity
    • B29C66/81263—Dielectric properties
    • 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
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    • B29C66/80—General aspects of machine operations or constructions and parts thereof
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    • 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
    • B29C66/81431—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 comprising a single cavity, e.g. a groove
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/80—General aspects of machine operations or constructions and parts thereof
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    • B29C66/816—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 mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8161—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 mounting of the pressing elements, e.g. of the welding jaws or clamps said pressing elements being supported or backed-up by springs or by resilient material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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Abstract

本发明涉及一种用于形成袋组件的装置，包括对置的压模构件。每个压模构件具有用于形成袋组件周边焊缝的周边焊接部和用于形成袋的管子焊缝的管子焊接部。在操作期间，首先，周边焊接部和管子焊接部同时焊接袋组件，然后，移动周边焊接部以增加它们之间的距离。当周边焊接部移动分开时，通过周边焊接部进行的焊接基本上悬置，而通过管子焊接部进行的焊接可继续。

Description

制作袋组件的装置和方法
技术领域
本发明一般涉及形成袋组件的装置，该袋组件包括袋和提供与袋内部流体连通的管子。
背景技术
由射频能量进行的焊接是制造某些产品的有效和快速的方式。例如，射频能量可用于焊接某些聚合材料，如聚氯乙烯(PVC)，以制作用于容纳  流体的柔性袋。例如，将用于接纳加压空气的袋子或袋囊结合到脉管挤压设备中以防止肺栓塞和深静脉血栓(DVT)。
典型的脉管挤压设备的袋囊包括绕其周边焊接的一对对置的聚合物片材和一个焊接在该片材之间的聚合物管口，该管口与袋囊流体连通。形成该袋囊的示例性过程采用将袋囊焊接在一起的袋囊模具和将聚合物片材焊接到管子上的圆柱形芯棒。在第一焊接工段，将圆柱形芯棒***管子，并将芯棒和管子放置到该对置的片材之间。降低管子模具以挤压该片材之间的管子和芯棒。向芯棒供给射频电流以在芯棒和模具之间建立射频电场。该电场加热聚合物片材和管子，从而将片材焊接到管子上。当片材焊接到管子上后，从管子内取出芯棒并且子组件移动到形成袋囊周边的第二焊接工段。该子组件在两个对置的压模构件之间受到挤压，并且将射频电流引导到压模构件上以形成周边焊接。
由于将芯棒***管子内并在该过程后从管子内取出芯棒都存在困难，因而采用圆柱形芯棒是低效和耗时的。此外，需要至少两个不同的焊接操作来形成袋囊。而且，芯棒必须连接到射频能量源。
在另一种过程中，芯棒由一种刚性的、不可变形的管状***件代替，该管状***件容纳在管子内。与上面的过程相同，向模具提供射频能量以建立电场。然而，在该过程中，模具包括包围管子和管状***件并且将射频电场引导到管子和包围管子的片材上以将它们焊接在一起的部分。
虽然该过程据称将袋囊和管子同时且在一个步骤中都焊接到袋囊上，但采用管状***件无疑(without more)不足以将袋囊和片材都焊接到管子上。将片材焊接到管子上比焊接袋囊需要花费更长的时间，因为管子典型地比聚合物片材厚。如果该过程持续的时间长得足以将片材充分焊接到管子上，则会存在以下可能：由于片材承受电场的时间量，模具会在袋囊周边切断或至少削弱袋囊。
发明内容
在一方面，一种形成包括袋和提供与袋的内部流体连通的管子的袋组件的方法，该方法通常包括将包含对置片材和至少部分容纳于所述片材之间的管子的袋子组件(subassembly)放置在一对对置的压模构件之间。使用压模构件挤压袋子组件，并且在第一位置处、在压模构件之间建立调制成射频范围内的电场，用于沿一路径加热所述片材以焊接所述片材，从而形成袋的周边，并且在第二位置处建立电场以将管子焊接到所述片材上。在第一位置处的压模构件部分之间的间距增大以充分减少片材在第一位置处的热量，同时在第二位置处的压模构件部分位于在第二位置处引起连续焊接的间距处。
在另一方面，一种用于形成袋组件的装置通常包括包含第一和第二压模构件的模具，其中该袋组件包括由对置片材沿周边焊缝焊接在一起形成的袋和沿管子焊缝焊接到对置片材上用于提供与袋内部流体连通的管子。压模构件具有用于将片材焊接到管子上的对置的管子焊接部和用于将片材焊接在一起以形成袋的对置的周边焊接部。第一和第二压模构件放置成可朝向彼此相对移动以挤压片材和管子，并可彼此远离。当第一和第二压模构件挤压片材和管子时，第一压模构件的周边焊接部可相对于第一压模构件的管子焊接部移动，以允许第一压模构件的周边焊接部和对置的第二压模构件的周边焊接部之间的间距增加，从而由周边焊接形成的片材焊接大体上受到抑制，而由管子焊接部形成的焊接可继续进行。射频电流源电连接到第一和第二压模构件中的至少一个，用于当第一和第二压模构件挤压片材和管子时，向片材和管子施加射频电场以焊接片材和管子。
在另一方面，一种用于保持流体的设备的管组件包括具有至少一个轴向部分的管子，其轴向部分能够由高频电场焊接。管子内的管状***件沿管子的整个轴向部分延伸。管状***件可弹性变形以产生从有利于焊接的大体压扁的、扁平构造向有利于流体流过管状***件的开放构造的恢复运动。
其它特征一部分是显而易见的，一部分将在此后指出。
附图说明
图1是袋囊组件的一个实施例的透视图；
图2是沿包含图1线2-2的平面截取的袋囊组件的截面图；
图3是沿包含图1线3-3的平面截取的袋囊组件的放大局部截面图；
图4是用于制造图1中袋囊组件的焊接装置的一个实施例的示意性正视图；
图4A是焊接装置下压模构件的放大局部透视图；
图5是焊接装置上压模构件的俯视图；
图6是图4中下压模构件的俯视图；
图7是带有管子焊接部的上下压模构件和从其分解的保持设备的放大局部正视图；
图8是上压模构件的管子焊接部的透视图；
图8A是形成袋囊组件的管子焊缝的管子焊接部的正视图，其示意性示出了来自射频发生器的射频能量电流；
图8B是表示作为电气部件的管子焊接部部分的电气示意图；
图9是上压模构件的放大局部截面；
图10是上下压模构件的放大局部截面图，其中上压模构件处于初始构造，并且袋囊子组件放置在上下压模构件之间；
图11是类似于图10的视图，其中上压模构件处于初次焊接构造，周边焊缝和管子焊缝形成在袋囊组件上；
图12是类似于图11的视图，其中上压模构件处于二次焊接构造，周边焊缝已完成并且管子焊缝继续形成；
图13是类似于图11的视图，其中当周边焊缝和管子焊缝完成后，上压模构件处于其初始位置；
图14是焊接装置的管子焊接部的另一实施例的透视图，其中介电元件从其上分解；
图15是当上压模构件处于初始构造且袋囊子组件放置在上下压模构件之间时的管子焊接部的前视图；
图16是类似于图15的视图，其中上压模构件处于初次焊接构造，管子焊接部挤压管组件；
图17是类似于图16的视图，其中管子焊缝已完成，且管子焊接部不再挤压管组件；
图18是管组件的透视图，其中管状***件从管组件的管子上分解；
图19是管组件的纵向截面图；和
图20是与图3类似的袋囊组件的放大局部截面图，但其中图18的管组件固定到该组件上；
在整个附图中，相应的附图标记指示相应的部件。
附图说明
现在参见附图，特别是附图1-3，袋囊组件(泛称“袋组件”)通常以10指示。袋囊组件构造成与脉管挤压设备一起使用。如图1所示，组件10包括三个管子12，每个管子在通常以18指示的管口(图3)处与袋囊组件的相应袋囊16的内部14(图2)流体连通。对置的片材20沿周边焊缝22焊接在一起以形成三个袋囊16(图1和2)。可以理解，袋组件10中的袋囊16可以是任何所需的数目，每个袋囊中的管子12的数目也可以是任何所需的数目。除用于脉管挤压设备外，包括用于保持液体在内的袋组件的其他用途也落入本发明的范围内。
每个管子12包括用于将片材20焊接到管子上的管状***件25。
管状***件25将在下面进行更详细的解释。管子12在通常以24示出的管子焊缝处焊接在对置片材20之间，从而每个管子由其中一个袋囊16的内部14密封，并且与袋囊内部的流体连通仅通过管子形成(图1和3)。每个管子焊缝24包括绕管子12的圆周延伸的圆周焊缝区26和在管子对置的侧面处从圆周焊缝区横向伸出的一对对置的横向焊缝区28。横向焊缝区28与圆周焊缝区26相邻。在脉管挤压设备生产的靠后的阶段，可将一连接器(未示出)固定到管子12的端部。该连接器将管子固定到用于将加压空气引入袋囊16的空气压缩机上。如本领域技术人员已知的，可将其他材料层施加到袋囊组件10上以完成脉管挤压设备的生产。此外，形成袋囊16的片材20可具有任何数目的材料层。另外，代替将全部长度的管子12固定到片材20上，可以将一些短的管道段(未示出)固定到片材上，并且在靠后的生产阶段中，可将全部长度的管子固定到这些短的管道段上。其他布置也落入本发明的范围内。
参见图4-12，用于制作袋囊组件10的焊接装置的一个实施例通常以30示出。参见图4，通常，该装置包括通常以30示出的模具，该模具包括通常以34示出的上压模构件和通常以36示出的下压模构件。焊接装置30的挤压设备38在压模构件34、36之间挤压对置的片材20和放置在片材(泛称“袋囊子组件”)之间的管子12。电连接至模具32上的射频发生器40(泛称“射频电流源”)在压模构件34、36之间建立射频场，其加热片材20和管子12以将片材焊接到袋囊16中并将片材焊接到管子上。如在此所使用的，术语“袋囊子组件”泛指在片材和管子焊接前的片材20和放置在片材之间的管子12。在本发明的范围内，其他部件可以包括在子组件内，而且一些部件可以已经连接在一起。袋囊子组件在图10中通常以42示出。焊接装置30还包括用于集成控制挤压设备38和射频发生器40的电源的微控制器44。
如图4A-6所清楚示出的，每个压模构件34、36包括周边焊接部，其通常分别以46A和46B示出，用于将片材20焊接在一起以形成袋囊16的周边以及管子焊接部，其通常以48A和48B示出，用于将片材焊接在管子12周围。由于每个压模构件34、36包括一个周边焊接部46A、46B和一个管子焊接部48A，48B，而且由于袋囊组件10具有一个以上的袋囊16(即，三个袋囊)，因此必需执行一个以上的操作来制作袋囊组件的独立袋囊。例如，沿着传送装置可能有三个独立的焊接装置用于焊接三个独立的袋囊16。可以理解，焊接装置30可以构造成在同一操作期间焊接单个袋囊组件的任何数目的袋囊。例如，焊接装置30可以包括一个以上的模具用于同时形成袋囊组件的一个以上的袋囊。可选择地，焊接装置可以包括具有多个(例如三个)周边焊接部和多个(例如三个)管子焊接部的单个模具。为清楚起见和为该讨论的目的，所示出的焊接装置30仅具有用于每次操作形成袋囊组件10的一个袋囊16的一对周边焊接部46A、46B和一对管子焊接部48A、48B。
上压模构件34的周边焊接部46A包括上周边焊接块50和从上块向下伸出的上周边焊接电极52(图4和5)。射频发生器40通过上周边焊接块50电连接到电极52上。电极52是细长的且具有与袋囊16的周边形状大体对应的形状或轮廓，除了该电极是不连续的。也就是说，电极52具有间隔开的端部。下压模构件36的周边焊接部48B包括下周边焊接块54和从下块向上伸出的下周边焊接电极56(图4、4A和6)。下周边焊接块54电接地。电极56的形状是上周边焊接电极52的镜像。电极52、56可以是其他结构。例如，上周边或下周边焊接电极52、56分别可以包括用于接纳其他电极的凹穴，或者上周边或下周边焊接电极可以是平坦的表面。其它构造均落入本发明的范围内。周边焊接块50、54和电极52、56可以由任何导电材料形成。例如，电极52、56可以由黄铜或铜或铝或不锈钢或镁制成，和/或可以是镀铜的或镀黄铜的。
如图5-7所最佳示出的，上下压模构件34、36的每个管子焊接部48A、48B分别包括管子焊接块58A、58B和分别位于管子焊接块上的通常以60A、60B示出的管子焊接电极。管子焊接块58A、58B放置在各自周边焊接块50、54的凹槽62A、62B内(图7)，从而管子焊接电极60A、60B放置在各自的周边焊接电极52、56的对置端部之间。管子焊接块58A、58B和电极60A、60B电连接至各自的袋囊焊接块50、54和电极52、56，从而上管子焊接块电连接至射频发生器40，而下管子焊接块电接地。可以理解，上述电连接可以反向，其也落入本发明的范围内。
参见图7和8，每个管子焊接电极60A、60B分别包括凹陷的、弧状表面64A、64B，以及对置的平面横向表面66A、66B。凹陷的、弧状表面60A、60B的尺寸和形状形成为当袋囊子组件42被压在压模构件34、36之间时，充分完全地包围管子12待焊接到袋囊组件10内的轴向部分。施加到这些凹陷表面64A、64B之间的射频电场形成管子焊缝24的圆周焊缝区26(参见图3)。凹陷的、弧状表面64A、64B通常具有略大于管子12半径的深度和宽度，以容纳位于管子上面和下面的片材的厚度。同样，施加于电极60A、60B的横向表面66A、66B之间的射频电场形成管子焊缝24的横向焊缝区28。管子焊接块58A、58B和电极60A、60B可以具有其他形状，并且可以由任何导电材料形成。例如，电极60A、60B可以由黄铜或铜或铝或不锈钢或镁制成，和/或可以是镀铜的或镀黄铜的。
如在全部附图中所示出的，介电元件68附着到电极60A、60B的横向表面66A、66B上。介电元件68接触片材20并且能够使电极60A、60B的横向表面66A、66B之间产生的射频电场沿电极均匀分布，并且防止在电极之间产生电弧。采用介电材料68调谐管子电极60A、60B，从而与管子焊缝24的横向焊缝区28更接近于相同的速度形成圆周焊缝区26。否则，在未调谐电极60A、60B的情况下，横向焊缝区28就会比圆周焊缝区26加热得更快，从而导致横向焊缝区处的片材20变薄和变弱，和/或在圆周焊缝区处形成不完整焊缝。
参见图8A，在操作期间，射频发生器40向上管子焊接部48A释放射频能量。射频能量从上管子焊接部48A穿过对置的片材20和管子12，流到下管子焊接部48B。该射频能量流可以由通常以图8B中的附图标记69示出的电路进行模拟。对置的横向表面66A、66B和上下管子焊接电极60A、60B的介电材料68可由电容器C1和C2进行模拟。上管子焊接电极60A的弧状表面64A和管状***件25的上部可由电容器C3进行模拟。下管子焊接电极60B的弧状表面64B和管状***件25的下部可由电容器C4进行模拟。在电路69中，电容器C1和C2彼此并联连接并连接到电容器C3和C4，电容器C3和C4彼此串联连接，如图8B所示。通常，电容器C1-C4的电容应当满足以下关系以实现管子焊缝24的均匀焊接：(1/C3)+(1/C4)＝(1/C1)＝(1/C2)。换句话说，必须调整横向表面66A、66B之间的介电材料68以允许将较多的射频能量引导到电容器C3和C4上(即，引导到圆周焊缝26上)。管子12需要横向表面66A、66B之间(电容器C1和C2)更厚的介电元件68，以产生满意的管子焊缝24。介电元件68的厚度和介电常数设定成使圆周焊缝区26以与管子焊缝24的横向焊缝区28基本上相同的速度形成。确定介电元件68正确的厚度和介电常数以确保正确的焊接在本申请中通常被称为调谐。
参见图7-9，焊接装置30包括用于使上压模构件34的管子焊接部48A相对于上压模构件的周边焊接部46A独立地压靠袋囊子组件42的保持设备70。更具体地，当保持设备70继续使压模构件的管子焊接部48A压靠片材20和管子12时，焊接装置30构造成使上压模构件34的周边焊接部46A上升。对置的突片72从上管子焊接块58A的侧面向外横向伸出。如在图9中所最佳看出的，突片72容纳于限定上凹槽62A的侧壁中形成的狭槽74中，以使上管子焊接部48A相对于上周边焊接部46A滑入该凹槽。狭槽74在还未到达上周边焊接块50的底表面位置处终止以为突片72提供阻挡件，从而使管子焊接部48A保持在凹槽62A内。保持设备包括位于凹槽62A内的弹簧70，该弹簧70位于管子焊接部48A的顶表面和形成凹槽的上壁82之间。弹簧70在管子焊接部48A上施加向下的力，从而管子焊接部相对于子组件42保持其位置，并且当上压模构件34的上周边焊接部46A上升至距离袋囊子组件一小段距离时继续挤压子组件。可以理解，另一保持设备可与下管子焊接部相连。独立于周边焊接部46A挤压管子焊接部48A的其它方式也落入本发明的范围内。例如，可采用缸体，如汽缸，来代替弹簧70。
现参考图10-12，其示出形成袋囊组件10的示例性过程。管状***件25插到聚合物管子12内。管状***件25可以由非铁金属形成，如黄铜或铜或铝或不锈钢，或者可以由其它材料形成。管状***件25的尺寸和形状形成为滑动配合在管子12要焊接到片材20上的轴向部分内。这样，管状***件12可具有基本上与压模构件34、36的管子焊接电极60A、60B的弧状管子焊接表面64A、64B相同的长度。可以理解，***件25可以是其它尺寸，例如，其可以延伸到管子12的整个长度。
将带有管状***件25的管子12放置在片材20之间以形成袋囊子组件42。利用挤压设备，上压模构件34处于初始位置(图10)，从而上管子焊接电极60A与下管子焊接电极60B间隔距离D1，且上周边焊接电极52与下周边焊接电极56间隔距离D2。弹簧70迫使上管子焊接部48A向下，从而上管子焊接电极60A延伸越过上周边焊接电极52。可以理解，保持设备可包括将上管子焊接部48A保持在某一位置的可缩回阻挡件(未示出)或其它设备，在该位置当上压模构件34处于初始位置时使上管子焊接电极60A与上周边焊接电极52大体水平地对准。距离D1、D2应当设置成使袋囊子组件42能够放置在压模构件34、36之间。
然后将袋囊子组件42放置在下压模构件36上。可以理解，袋囊子组件42可以预先装配，然后放置在压模构件34、36之间，如上所述，或者可以在压模构件之间进行装配。当袋囊子组件42放置在压模构件34、36之间后，启动挤压设备38以使上压模构件34降低至初次焊接构造中(图11)，从而管子焊接电极60A、60B和周边焊接电极52、56都压缩袋囊子组件。来自发生器40的射频电流供应到上压模构件34的周边焊接部46A和管子焊接部48A上。射频电流在管子焊接电极60A、60B之间和周边焊接电极52、56之间建立在射频范围内调制的电场(泛指，射频能量)。如本领域所公知的，射频电场对放置在电极60A、60B和52、56之间的聚合物片材20和管子12进行加热。
在袋囊16的周边焊缝22已由周边焊接电极52、56形成的第一时间段之后，挤压设备38使上压模构件34上升至二次焊接构造中(图12)。在该构造中，上周边焊接电极52与下周边焊接电极56间隔距离D3。借助弹簧70，管子焊接电极60A、60B继续压缩袋囊子组件42，且射频电场仍存在于管子焊接电极之间。也就是说，当上周边焊接部46A向上移动时，弹簧70保持上管子焊接电极60A与子组件42相接触。如果保持设备具有阻挡机构，如上所述，则阻挡机构将脱开以允许弹簧70保持上管子焊接部48A相对于子组件42的位置。距离D3可以在约0.1英寸和约0.5英寸之间。该距离足以使射频电场足够弱，从而周边焊接电极52、56之间的袋囊子组件42不会明显被加热。可以理解，该距离可以取决于射频电场的强度。
当上压模构件34处于二次焊接构造时，来自发生器40的大部分射频电流完全被引导到管子焊接电极60A上。这在管子焊接电极60A、60B之间建立起比初次焊接构造中存在的更强的射频电场。可降低射频发生器40的输出以减弱管子焊接电极60A、60B之间的射频能量强度，从而控制加热速度。否则，片材20和管子12会烧焦或显著变薄，从而削弱管子焊缝24。
在管子12被焊接到片材20上的第二时间段之后，挤压设备38使上压模构件34升回至其初始构造中(图13)，从而上管子焊接电极60A和上周边焊接电极52不与所形成的袋囊组件10相接触。此时，袋囊组件10的装配基本上完成，从而形成袋囊16且管子12被焊接成与袋囊流体连通。
可以理解，基本上整个焊接过程可利用微控制器44自动进行。例如，微控制器44可被编程为利用挤压设备38自动将上压模构件34设置为处于其初始位置；使上压模构件在预定的或预编程的第一时间段下降到其初次焊接构造；使上压模构件在预编程的第二时间段上升至其二次焊接构造；如上所述调整射频发生器40的输出；以及使上压模构件升回至其初始构造。其它的自动运行焊接装置的方法也落入本发明的范围内。
参见图14-17，在另一个实施例中，焊接装置30可包括通常分别以84A、84B示出的上、下管子焊接部，其分别具有带浅轮廓的弧状表面86A、86B的电极85A、85B，用于将带有可弹性变形管状***件90的管组件88焊接到片材20上。除管组件88以外，袋囊组件56的其余部分可与第一实施例相同。管子焊接部84A、84B的与前面实施例相同的部件由与前面实施例相同的附图标记示出。为清楚起见，在图14-17中仅示出焊接装置30的管子焊接部84A、84B。可以理解，管子焊接部84A、84B代替了前面的焊接装置30中的管子焊接部48A、48B。还可以理解，可替换地，管子焊接部84A、84B可用于其他焊接装置。
参见图18和19，可弹性变形管状***件90容纳在管组件88的管子94的内腔92中。如在此所使用的，术语“管组件”指具有管状***件90的管子94。管状***件90限定***件内腔96，内腔96与各自的管内腔92大体同心。虽然管状***件可沿各自管子的整个轴向长度延伸，但是管状***件90的尺寸和形状形成为大体仅沿管子94的轴向部分98延伸。管状***件90可通过摩擦配合固定在各自的管内腔92内或可粘附在管内腔内部。管状***件90的形状限定管子94轴向部分98的形状。参见图17-20，在所示出的实施例中，管状***件90以及管子94的轴向部分98具有大体椭圆形的横截面，其长轴大体平行于包含袋囊组件10表面的平面，而短轴大体垂直于该平面延伸。该椭圆形为管子94提供一个大体浅的轮廓，在该浅的轮廓处管子被焊接到袋囊组件10内。
为下面解释说明的目的，管状***件90在不放置在射频交流电场内时，通常不会被加热到熔点。因此，管状***件90在射频电场内可不易被加热和/或可具有比管子94的熔化温度更高的熔化温度。例如，管状***件90可由聚乙烯、聚丙烯或PTFE形成，这些材料在射频电场内都不易被加热。可选择地，形成***件内腔96的管状***件90内表面100在射频电场内可不易被加热和/或可具有比管子94的熔化温度更高的熔化温度。在一个实例中，管状***件90可由可通过高频能量焊接的材料(即，在高频电场内易于加热的材料)形成，而且***件的内表面100可涂覆或粘附到在射频电场内不易被加热的材料上。
再参见图15-17，在焊接过程期间，且更具体地，当上压模构件34处于初次焊接构造时，当上压模构件压缩袋囊组件56时，管子94、管状***件90和包围管子的片材20变扁平，这减少了管组件88区域内袋囊子组件56的厚度变化。在压缩期间，管子94和管状***件90处于大体扁平状态，且管子的宽度基本上沿电极85A、85B的弧状表面86A、86B的整个长度延伸，如图16中所示。当压模构件34、36压缩扁平管子和管状***件之间的片材时，射频交流电场将管组件88焊接到片材20上。如上所述，管状***件90在射频电场存在下不会加热到足够熔化的点，因此，管状***件的内表面100在该过程期间不会一起熔化。如果管状***件90或至少管状***件的内表面100易于通过高频能量加热，则管状***件在该过程期间会被焊接封闭，从而妨碍管子94和袋囊16之间的流体连通。
参见图17，当上压模构件34上升远离袋囊子组件56时，管状***件90从其扁平构造径向胀开或回弹，从而打开其内腔96并打开管内腔92。在其最终构造中，管状***件90将具有大体椭圆形的横截面，如上所述以及如在图17和20所示出的。可以理解，管状***件90在焊接前可以或可以不具有这种大体椭圆形的横截面，但在完成后的袋囊组件10中可呈现这种椭圆形构造。例如，管状***件90在原始时可具有大体圆形的横截面。
在另一个实施例(未示出)中，本焊接装置还包括用于限制上周边焊接电极穿透进入对置片材的阻止件或阻挡件(stand-offs)。该阻止件可包括沿下压模构件的周边焊接部的周边放置的柱状体。可以理解，阻止件可具有其它形状且可采用单个或连续的阻止件。阻止件可以与下压模构件或上压模构件或上、下压模构件一体形成。
当介绍本发明或其优选实施例的元件时，冠词“一”、“一个”、“该”和“所述”旨在意味着有一个或多个元件。术语“包括”、“包含”和“具有”旨在包括和意味着在所列出的元件以外还可有其它元件。
由上所述，将会看出本发明的几个目的得以实现且获得其它的有益效果。
由于在不偏离本发明范围的情况下可对上述结构、产品和方法进行各种变化，因此包含在上述描述内和在附图中显示的全部内容都应解释为是示例性的而非限制意义的。

Claims (22)

1.一种形成袋组件的方法，该袋组件包括袋和提供与袋内部流体连通的管子，该方法包括：
通过将所述管子的至少一部分容纳在一对对置片材之间而形成子组件；
将所述子组件放置在第一压模构件和与所述第一压模构件对置的第二压模构件之间，
通过所述第一压模构件和第二压模构件挤压所述子组件，
在第一位置处、在所述第一压模构件和第二压模构件之间施加电场，用于沿一路径加热一对所述片材以将一对所述片材焊接在一起，从而形成袋的周边，并且在第二位置处施加电场，用于将管子焊接到一对所述片材上，以及
在第一位置处增加对置的所述第一压模构件和第二压模构件的部分之间的间距，以减少第一位置处的一对所述片材的加热，而在第二位置处所述第一压模构件和第二压模构件的部分处在这样一种间距，其导致在第二位置处的连续焊接。
2.如权利要求1所述的形成袋组件的方法，其中所述施加电场包括向所述第一压模构件和第二压模构件供应单个射频电流。
3.如权利要求2所述的形成袋组件的方法，还包括在所述增加间距的步骤之后使电场变弱。
4.如权利要求3所述的形成袋组件的方法，其中所述挤压所述子组件的步骤包括采用压力迫使所述第一压模构件和第二压模构件中的一个压向所述第一压模构件和第二压模构件中的另一个。
5.如权利要求1所述的形成袋组件的方法，其中施加电场的步骤包括同时形成袋的周边焊缝以及一对所述片材和管子之间的管子焊缝，周边焊缝和管子焊缝在袋组件上形成连续焊缝。
6.如权利要求1所述的形成袋组件的方法，其中管子包括可弹性变形的管状***件，并且所述挤压所述子组件的步骤包括压扁管子和管状***件。
7.如权利要求6所述的形成袋组件的方法，还包括使第一压模构件上升远离所述子组件，使得所述管状***件从其扁平构造径向胀开。
8.如权利要求7所述的形成袋组件的方法，其中管状***件在处于其最终构造时具有椭圆形的横截面，该椭圆形的横截面具有设置成平行于含有所述子组件的表面的平面的长轴。
9.如权利要求8所述的形成袋组件的方法，其中管状***件不受所施加的电场的影响。
10.如权利要求9所述的形成袋组件的方法，其中管状***件压配合在管子内。
11.如权利要求9所述的形成袋组件的方法，其中管状***件粘附到管子的内侧。
12.一种用于形成袋组件的装置，该袋组件包括由对置的片材沿周边焊缝焊接在一起形成的袋子和沿管子焊缝焊接到对置片材上用于提供与袋子内部流体连通的管子，该装置包括：
包含第一压模构件和与所述第一压模构件对置的第二压模构件的模具，所述第一压模构件和第二压模构件具有用于将对置片材焊接到管子上的对置的管子焊接部，和用于将对置片材焊接在一起以形成袋的对置的周边焊接部，所述第一压模构件和第二压模构件放置成能够朝向彼此相对移动以挤压对置片材和管子，并能够彼此远离移动，当第一压模构件和第二压模构件挤压对置片材和管子时，第一压模构件的周边焊接部能够相对于第一压模构件的管子焊接部移动，以允许增加第一压模构件的周边焊接部和第二压模构件的周边焊接部之间的间距，使得通过周边焊接部进行的对置片材焊接悬置，而通过管子焊接部进行的焊接能够继续进行；
射频电流源，其电连接到第一压模构件和第二压模构件中的至少一个上，用于当第一压模构件和第二压模构件挤压对置片材和管子时，向对置片材和管子施加射频电场以焊接对置片材和管子。
13.如权利要求12所述的用于形成袋组件的装置，还包括保持设备，其用于在第一压模构件的周边焊接部和第二压模构件的周边焊接部之间的间距增加时，保持第一压模构件的管子焊接部和第二压模构件的管子焊接部之间的间距。
14.如权利要求13所述的用于形成袋组件的装置，其中所述保持设备在第一压模构件的管子焊接部上独立于第一压模构件的周边焊接部施加力，以当第一压模构件的周边焊接部和第二压模构件的周边焊接部之间的间距增加时，保持第一压模构件的管子焊接部和第二压模构件的管子焊接部之间的间距。
15.如权利要求14所述的用于形成袋组件的装置，其中第一压模构件的管子焊接部能够滑动地与第一压模构件的周边焊接部接合。
16.如权利要求15所述的用于形成袋组件的装置，其中第一压模构件的管子焊接部包括从其上横向伸出的至少一个突片，该突片被容纳于第一压模构件的周边焊接部的狭槽内。
17.如权利要求16所述的用于形成袋组件的装置，其中第一压模构件的周边焊接部包括由侧壁形成的凹槽，第一压模构件的管子焊接部被容纳于该凹槽内。
18.如权利要求16所述的用于形成袋组件的装置，其中保持设备包括至少一个弹簧。
19.如权利要求14所述的用于形成袋组件的装置，还包括与所述第一压模构件和第二压模构件中的至少一个接合的挤压设备，用于将第一压模构件和第二压模构件集合在一起以及用于增加第一压模构件的周边焊接部和第二压模构件的周边焊接部之间的间距，同时允许保持设备保持第一压模构件的管子焊接部和第二压模构件的管子焊接部之间的间距。
20.如权利要求12所述的用于形成袋组件的装置，其中第一压模构件和第二压模构件串联连接到射频能量源上。
21.如权利要求19所述的用于形成袋组件的装置，还包括构造成在第一压模构件的周边焊接部移动远离第二压模构件的周边焊接部之后自动使射频能量源输出变弱的控制器。
22.如权利要求12所述的用于形成袋组件的装置，其中所述第一压模构件和第二压模构件的每个管子焊接部都包括具有低轮廓弧状表面的管子焊接电极，该表面用于在焊接期间压扁管子和管子内的可弹性变形***件。
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EP2617551A3 (en) 2013-07-31
CN101204856A (zh) 2008-06-25
EP1935616A3 (en) 2012-11-07
US7964829B2 (en) 2011-06-21
US20080149609A1 (en) 2008-06-26
MX2007015034A (es) 2009-02-12
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EP1935616A2 (en) 2008-06-25
US20110220540A1 (en) 2011-09-15

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