CN1196576C - 制造容器的方法和设备 - Google Patents

制造容器的方法和设备 Download PDF

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CN1196576C
CN1196576C CNB018064655A CN01806465A CN1196576C CN 1196576 C CN1196576 C CN 1196576C CN B018064655 A CNB018064655 A CN B018064655A CN 01806465 A CN01806465 A CN 01806465A CN 1196576 C CN1196576 C CN 1196576C
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welding
advance
station
opening
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CN1418147A (zh
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普里莫·菲纳提
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Sarong SpA
INOVAPAK Srl
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/06905—Using combined techniques for making the preform
    • B29C49/0691—Using combined techniques for making the preform using sheet like material, e.g. sheet blow-moulding from joined sheets
    • 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
    • B29C66/03—After-treatments in the joint area
    • B29C66/032—Mechanical after-treatments
    • B29C66/0324—Reforming or reshaping the joint, e.g. folding over
    • 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
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • 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
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • 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
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/001—Shaping in several steps
    • 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
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/0081—Shaping techniques involving a cutting or machining operation before shaping
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/64—Heating or cooling preforms, parisons or blown articles
    • 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
    • B29C66/20—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
    • 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
    • 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
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • 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
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4326—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms for making hollow articles or hollow-preforms, e.g. half-shells
    • 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
    • B29L2031/7158—Bottles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Vending Machines For Individual Products (AREA)
  • Making Paper Articles (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Container Filling Or Packaging Operations (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

在本发明的制造方法和设备中，沿着一个前进方向(F)供应相互面对着的至少两条可热焊材料带(A和B)。带在预定焊接区焊接并产生小室(4)，每个小室具有至少一个开口(5)。环绕小室(4)的一部分焊接区被切割、折叠和与小室(4)一起插入成形空腔(71)中。成形流体喷入开口，在成形空腔之内膨胀小室。本发明能够使塑料容器制造成在焊接区没有突起，在容器侧壁和底部的整个焊缝上具有低风险的容器泄漏。

Description

制造容器的方法和设备
技术领域
确切地说，但不仅仅是，本发明可用于制造塑料瓶。
背景技术
专门参照一种可焊接材料制造容器的方法。它包括下列阶段：沿前进方向供应至少两条相互面对着的可焊接材料带，在预定的焊接区焊接带以产生小室，把每个小室插入成形空腔，并在成形空腔之内膨胀小室。
人们已经知道这种类型的制造方法，例如从欧洲公开号EP 0 719630，它描述了一种制造塑料瓶的方法，沿焊缝没有向外突出的部分。
但是，这种方法包含了一些缺点。
首先，瓶内压力(例如在成形阶段用于吹送成形流体的压力，或者使用者为排出容器内含物而作用的挤压压力)会使焊接区中的相互连结片被相互剥开，造成片被分离的危险和在焊接区中不希望的瓶开口。
其次，在成形后剪除的瓶区具有两个面朝外的切割部分，可能刺痛或者甚至伤害到握住瓶的使用者。
第三，由于沿焊接区存在朝瓶内突出的大量焊缝材料，瓶的内部容量和外部体积之比被部分地减小，从而减小了瓶的容量。
本发明的主要目的是提供一个制造方法，用于制造在焊接区没有突起的容器，由此可能避免上述先前技术中的缺点。
本发明的一个优点是可以提供一个比较快速而经济的制造方法。
另一个优点是制造出具有较大机械抗力的容器，侧壁和底部上整个焊接区受损的风险小，没有易于切伤使用者的外面部分，采用了比较少量的材料，它在焊接区朝容器内腔突出，仅稍微减少了容器的容量。
本发明的另一个目的是提供一个设备，它在结构上简单而经济，能够起动本发明的制造方法。
本发明完全达到了这些目的和优点及其他目的和优点。
发明内容
在本发明的第一方面中，提供一种制造可焊材料容器的一个方法，包括以下阶段：沿着前进方向供应至少两条相互面对着的可焊接材料带；在预定焊接区焊接带以产生小室；把每个小室插入成形空腔，并且在成形空腔之内膨胀小室；其特征在于：在膨胀小室之前，至少一个小室边上至少一部分焊接区被切割、折叠和插入成形空腔中。
在本发明的第二个方面中，提供了一种制造可焊接材料容器的设备，包括：至少一条供应路线，沿着它按照前进方向推进至少两条相互面对的可焊接材料带；至少一个焊接工位，其中在预定焊接区上焊接带以产生小室；至少一个成形工位，其中每个小室在成形空腔之内膨胀；其特征在于：它包括至少一个预先设在成形工位上游的切割和折叠工位，其中在小室边上的至少一部分焊接区被切割和折叠。
在本发明的第三个方面中，提供了一种可焊接材料制造的容器，包括至少一个侧壁、至少一个底部和至少一条焊接线，焊接线至少部分地在壁内延伸，其特征在于：至少一个壁的两个端片之间的结合而形成焊缝，在与壁相切的平面中，一个片叠合在另一片上。
附图说明
根据按照本发明一个优选但不是唯一的实施例的详细描述，将较好地显示本发明的其他特征和优点，仅通过在附图中的一个非限定性例子来说明，其中：
图1是一个按照本发明作出的设备示意和部分侧视图；
图2是按照图1中II-II线作出的截面图；
图3a和3b是切割和折叠步骤中的两个连续阶段；
图4表示了在成形流体喷射之后图2的成形工位；
图5表示了由本发明设备制造的容器；
图6是按照图5中VI-VI线作出的截面图；
具体实施方式
参照上述附图，1概括地表示了成形可热焊材料容器的设备。
设备1包括至少一条供应路线2，两条材料带A和B沿着它按F所示方向前进。带A和B相互面对着并由可热焊塑料制成。
沿着供应路线2设置至少一个焊接工位3，在那里两条薄膜带A和B在预定焊接区焊接，产生了至少具有一个开口5的小室4。由位置对着的至少两个半模31和32完成焊接，半模可以按指令沿方向G1来回移动。焊接工位3包括许多位置对着的成对半模，从而对于带A和B的每次前进可以确定许多小室4。沿着两条薄膜带A和B的前进方向并排设置了成对半模。在图中，为了简化仅表示了一对半模31和32。小室4的开口5设在带的纵向边上。在图1中，薄膜带的焊接部分用虚线代表。
设备1包括至少一个切割和折叠工位6，它沿供应路线2设在焊接工位3的下游，其中至少环绕小室4的一部分焊接区被切割和折叠。在图1中切割和折叠部分用虚线代表。
切割和折叠工位6包括至少一个冲头61，它可以按指令沿着垂直于前进方向F的一个方向G2移动。冲头61与对着的底模62配合，切割和折叠至少部分环绕着至少一个小室4的焊接区。冲头61具有一个切割刀片，预先设置成在离开焊接区内边，即限定小室4外轮廓边的预定距离上切割焊接区中的薄膜带。在冲头61进行冲压操作时，底模62与下模63配合来挤压薄膜带。底模62和下模63可以按指令来回靠近和远离。
切割和折叠工位6包括许多对冲模，能够同时在一次操作中切割和折叠环绕许多小室4边上的焊接区。
切割和折叠工位6还起到一个预热工位的作用，它包括了相应于每对冲模61-62的一对对着设置的加热半模64，半模可以按指令沿着方向G2来回移动，并且预先设置来加热至少一个小室4。半模64位于一对冲模61-62之内。加热半模64还具有在冲头61切割和折叠动作时固定薄膜带的用途。至少一个弹簧65作用在冲头61和至少一个加热半模64之间。
沿着供应路线2，在焊接工位3的下游至少有一个成形工位7，其中通过开口5把成形流体喷射到小室4中，膨胀了在相关成形空腔71内的每个小室4。每个成形空腔71由至少两个对着的半模72组成，可以按指令相互沿方向G3移动。流体喷射装置位于成形工位7上，喷射出压力成形流体。流体喷射装置上设有至少一个喷管73，按指令可以沿着垂直于前进方向F的两个方向H移动。成形工位7最好包括许多对着的成对半模72和许多喷管73。每个喷管73预先设置成插入小室4的相应开口5中。
这里描述的设备在以下起动了一个成形可热焊材料容器的方法，由此沿前进方向F供应两条带A和B，并且在预定焊接区中焊接在一起，产生小室4。在预热之后，每个小室4插入相关的成形空腔71中，并且被热成形靠到确定成形空腔71的半模72内壁上。使小室膨胀的成形流体喷射通过小室4的开口5来完成热成形。
在喷射成形流体之前，至少环绕小室4的一部分焊接区被切割、折叠和插入成形空腔71中。由冲头61的推进来完成切割和折叠步骤。
冲头61的形状使得环绕小室4的至少一部分焊接区不被切割，从而在小室4和最靠近的小室之间，即下一个小室和上一个小室之间留下至少一个连接点。特别是，冲头61的形状使得在开口5的两侧，在小室开口5上留下两个连接点8和9，以及在对着开口的小室4的一侧留下至少一个连接点10。在小室4成形之前被预热的同一工位上，环绕小室4的至少一部分焊接区被切割和折叠。
闭合确定成形空腔的半模72，从而环绕小室4的已焊接、切割和折叠的片11保留在成形空腔71之内，如图2所示。当成形流体吹入小室4时，可热焊材料被吹送靠到半模72的内壁上，在其本身之内结合了已焊接、切割和折叠的片11，并且形成了一个容器12，具有在其侧壁和底部之内结合的焊接部分13，而不产生向外突出的部分。
在成形之后，得到许多容器12，每个容器具有一个开口5，并且以一条带的形式均保持在一起，具有连接点8，9和10。开口容器的带可用于在充填工位上充填容器。或者是，可以切割连接点8，9和10来得到单个分离的容器。
采用本发明制造方法和设备制造的容器12包括至少一个侧壁、至少一个本体、至少一条焊缝，焊缝至少部分地在侧壁和底部之内延伸。焊缝不突出在容器壁之外。由两个可热焊材料薄膜的两个叠合端片的结合来产生焊缝。在容器壁(特别是侧壁和底壁)的切向平面中，被结合的片一个叠在另一个上。这种焊接片(如图6所示)所在的平面，例如与径向平面比较，能够减少焊缝占据的空间，提供了更好的容器容量。
在另一个未图示的实施例中，环绕小室4的至少第一部分焊接区沿着一个方向折叠，而第二部分沿着另一个方向折叠。特别是，最好是焊接区的第一部分包括在位于容器底部(底部对着具有开口5的一端)的未切割连接点10和位于开口5第一侧上的连接点8之间，以及焊接区的第二部分包括在底部中心上的连接点10和位于与第一侧对着的开口第二侧上的连接点9之间。此时，切割和折叠工位包括两个冲头，沿着相互对着的方向作用，一个在操作上相应于焊接区的第一部分，另一个在操作上相应于焊接区的第二部分。

Claims (11)

1.制造可焊材料容器的一个方法，包括以下阶段：
沿着前进方向(F)供应至少两条相互面对着的可焊接材料带(A和B)；
在预定焊接区焊接带(A，B)以产生小室(4)；
把每个小室(4)插入成形空腔(71)，并且在成形空腔(71)之内膨胀小室(4)；
其特征在于：在膨胀小室(4)之前，至少一个小室(4)边上至少一部分焊接区被切割、折叠和插入成形空腔(71)中。
2.如权利要求1的方法，其特征在于：在小室(4)边上至少一部分焊接区没有被切割，从而至少一个连接点(8，9，10)留在一个小室(4)和一个最靠近小室(4)之间。
3.如权利要求2的方法，其特征在于：在上述焊接期间，沿每个小室(4)的边缘具有至少一个开口(5)，通过开口(5)喷射成形流体，以便在成形空腔(71)之内膨胀小室(4)。
4.如权利要求3的方法，其特征在于：在开口(5)的相对的两侧，至少两个连接点(8，9)留在开口(5)的附近。
5.如权利要求3或4的方法，其特征在于：至少一个连接点(10)留在对着提供开口(5)侧的小室(4)一侧上。
6.如权利要求中1的方法，其特征在于：在小室(4)边上焊接区的至少第一部分沿着一个方向折叠，以及至少其第二部分沿着其相反方向折叠。
7.如权利要求中1的方法，其特征在于：在小室(4)边上焊接区的至少一部分在工作工位上被切割和折叠，该工位也是预热小室(4)的工位。
8.一种制造可焊接材料容器的设备，包括：
至少一条供应路线(2)，沿着它按照前进方向(F)推进至少两条相互面对的可焊接材料带(A和B)；
至少一个焊接工位(3)，其中在预定焊接区上焊接带(A和B)以产生小室(4)；
至少一个成形工位(7)，其中每个小室(4)在成形空腔(71)之内膨胀；
其特征在于：它包括至少一个预先设在成形工位(7)上游的切割和折叠工位(6)，其中在小室(4)边上的至少一部分焊接区被切割和折叠。
9.如权利要求8的设备，其特征在于：切割和焊接工位(6)包括至少一个可以按指令沿垂直于前进方向的方向(G2)移动的冲头(61)，冲头(61)与对着设置的底模(62)配合，来切割和折叠至少部分在小室(4)边上的焊接区。
10.如权利要求9的设备，其特征在于：它包括至少一对预热半模(64)，预先设置来加热至少一个小室(4)和位于冲模对(61，62)之内。
11.一种可焊接材料制造的容器(12)，包括至少一个侧壁、至少一个底部和至少一条焊接线，焊接线至少部分地在壁内延伸，其特征在于：至少一个壁的两个端片之间的结合而形成焊缝，在与壁相切的平面中，一个片叠合在另一片上。
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