CN1152282A - 铝箔叠层管的密封部成型方法及密封部成型装置 - Google Patents

铝箔叠层管的密封部成型方法及密封部成型装置 Download PDF

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CN1152282A
CN1152282A CN96190414A CN96190414A CN1152282A CN 1152282 A CN1152282 A CN 1152282A CN 96190414 A CN96190414 A CN 96190414A CN 96190414 A CN96190414 A CN 96190414A CN 1152282 A CN1152282 A CN 1152282A
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extrusion molding
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CN1069280C (zh
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藤田守
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Yoshino Kogyosho Co Ltd
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    • 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
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/14—Closing collapsible or resilient tubes, e.g. for tooth paste, for lighter fuel
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
    • B29C65/1448—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface radiating the edges of the parts to be joined, e.g. for curing a layer of adhesive placed between two flat parts to be joined, e.g. for making CDs or DVDs
    • 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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    • 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
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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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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • 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
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    • 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
    • B29C66/137—Beaded-edge joints or bead seals
    • 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
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
    • B29K2705/02—Aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
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Abstract

将突出于夹具9的突出端部5的合成树脂材料加热溶融，将该突出端部5放入在铝箔层3c与成型模面之间的、形成供合成树脂侵入间隙的挤压成型空间内，挤压成形为密封部8，能将密封部8的外观形状设定为所需的形状，并完全覆盖铝箔层，通过挤压使密封部高密度化，提高密封强度。

Description

铝箔叠层管的密封部成形方法及密封部成形装置
所属领域
本发明涉及将铝箔叠层管的开放端挟扁并溶接固定成形的密封部成形方法以及实施该成形方法的密封部成形装置。
背景技术
现有技术中，由铝箔叠层管构成主体部分的合成树脂制管状容器的密封端成形是这样进行的：用夹具将管体开放的一端即端部从前后挟扁，用加热器对该被夹扁的并伸出于夹具的突出端部进行加热，使其溶融后，用密封金属模具从前后挤压使其溶接而形成密封部。
该现有的铝箔叠层管的密封部成形方法，是用加热器的加热使突出端部的合成树脂溶融，用一对密封金属模具对加热溶融了该合成树脂的突出端部从前后挤压，通过溶融了的合成树脂的溶接力紧密地溶接在一起而形成密封部。
但是，上述现有技术中，由于只用一对密封金属模具从前后挤压已加热溶融了合成树脂的突出端部，所以，突出端部的已溶融合成树脂的流动变形不能被限定为一定形态，因此，成形后的密封部外观形状也不能成为一定的形状。
由于只用一对密封金属模具从前后挤压加热溶融了合成树脂的突出端部，所以如图8所示，由于该对密封金属模具的挤压作用，溶化了的合成树脂的一部分被挤到侧方，成形后的密封部8的两侧端缘带有呈尖塔状突出的毛边部分。在使用该管状容器时，该毛边部分常会有刮破手指或皮肤等问题。
另外，成形后的密封部由于是仅用密封金属模具从前后挟扁而成形为最终形状的，所以其形状只能限定为类似于图8所示的形状，而不能形成一些有趣的形状，也不能形成用于组装其它吊具等的结构部分，不能得到作为商品的有趣味性的管状容器。
此外，现有的密封部由于是在铝箔层的端面露出的状态下，用密封金属模具从前后挤挟突出端部而成形的，所以，如图8所示，其端缘仍然是露出铝箔层3c的状态，因该露出铝箔层的腐蚀等原因造成密封部外观差，也造成密封部强度降低。
本发明是鉴于上述问题而作出的，其目的在于使铝箔叠层管的加热后被挤压成形的密封部能成形为所需的一定形状，使成形后的密封部外观形状好，并能完全复盖住铝箔层。发明内容
为了实现上述目的，本发明的方法是用一对夹具将铝箔叠层管体的端部挟扁，将该管体的突出于夹具的突出端部的合成树脂材料加热溶融，将该加热溶融了合成树脂的突出端部放入挤压成形空间内，挤压成形为所需形状的密封部，上述挤压成形空间在该突出端部的铝箔层与成形模面之间，形成有供突出端部的溶融状合成树脂侵入的间隙。
最好在突出端部挤压成形为密封部之前，将突出端部的两突出侧端角部用折叠或切去的方法形成为倒角的形状。
本发明的装置由一对夹具、加热器和挤压成形装置构成；夹具将铝箔叠层管体的端部挟扁；加热器对突出于夹具的上述端部的突出端部加热，将该突出端部的合成树脂材料溶融；挤压成形装置将上述加热溶融了合成树脂的突出端部挤压成形为所需形状的密封部。
上述挤压成形装置最好由阴模夹具和阳模夹具构成；阴模夹具可在一方夹具上沿挟扁方向滑动，在与管体的突出端部相对的前面，具有与突出端部相等或稍大宽度的凹状成形模面；阳模夹具可在另一方夹具上沿挟扁方向滑动，在与突出端部相对的前面具有凸状的成形模面，该凸状成形模面应不产生毛口地可无阻碍地紧密嵌入阴模的凹状成形模面内。
下面说明本发明的作用。
使管体端部的突出端部突出于具有平坦挤压面的一对夹具，用该夹具从前后将管体的端部挟扁，用加热器对该突出端部加热。
通过加热器的加热，突出端部的合成树脂材料溶融，但铝箔层不溶融，所以，溶融了的突出端部的合成树脂仍然附着在铝箔层上成为坍塌状。
加热器对突出端部的加热结束时，趁着突出端部的合成树脂在溶融状态时，将该突出端部放入挤压成形装置的阳模夹具与阴模夹具形成的成形空间内，由该阳模夹具和阴模夹具挤压成形为所需的形状，冷却后成形为密封部。
在该突出端部挤压成形为密封部时，挤压成形装置的阳模夹具和阴模夹具形成的所需形状的空间，在其成形模面与插入的突出端部的铝箔层之间，形成有供突出端部的溶融合成树脂流动侵入的间隙，所以，通过阳模夹具和阴模夹具对突出端部的挤压操作，突出端部的溶融合成树脂在成形空间内流动到突出端部的铝箔层周围，埋住成形模面与铝箔层之间的间隙，这样，成形后的密封部具有由挤压成形装置设定的外观形状，同时铝箔层完全被合成树脂复盖住。
另外，由于突出端部在密闭空间即成形空间内不产生短劣成型(ミヨ-トモ-ルド)地挤压成形为密封部，所以，密封部由突出端部被压缩成形，使密封部溶接的合成树脂由于该压缩密度提高，增强度了密封部的机械强度，溶接强度也增高。
在把突出端部形成为密封部的挤压成形之前，把突出端部的两突出侧端角部用折叠或切去的方法形成为倒角状，可大幅度地减少突出端部两突出侧端角部铝箔层的突出程度，这样，挤压成形装置形成的挤压成形空间的形状设定自由度大，突出端部的两突出侧端角部不会刮到挤压成形装置上，提高了成形操作的安全性。
附图说明
图1是表示铝箔叠层管端部构造图，图1(a)是平面图，图1(b)是端部的正面图。
图2是表示图1所示管体叠层构造的放大断面图。
图3是表示本发明一实施例管体端部挟扁工序的说明图，图3(a)是平面图，图3(b)是正面图。
图4是说明本发明一实施例的加热处理的正面图。
图5是表示本发明一实施例中加热处理后的突出端部状态的正面图。
图6是说明本发明一实施例的挤压成形处理图，图6(a)是平面图，图6(b)是正面图。
图7是表示用本发明一实施例成形的密封部外观形状的正面图。
图8是表示现有密封部外观形状的正面图。
最佳实施例
下面，参照图1至图7说明本发明的一实施例。
图1(a)是铝箔叠层管体1的平面图，图1(b)是包括管体1的端部4的一个端部的正面图。该管体1如图2所示，其叠层壁由外侧的厚外装薄片2和内侧的铝叠层箔片3构成。
铝叠层箔片3从外侧依次由白色软质聚乙烯制外皮层3a、原色软质聚乙烯制的起粘接作用的挤压层3b、JIS规格品铝箔层3c、聚氨酯类的第1干燥叠层3d、赋予铝叠层箔片3机械强度的聚对苯二甲酸乙二醇酯制的骨材层3e、聚氨酯类的第2干燥叠层3f、形成铝叠层箔片3内侧表面的软质聚乙烯制的内皮层3g构成。
如图3所示，在管体1的端部4的突出端部5伸出于夹具9的状态下，用该对夹具9从前后将端部4挟扁时，突出端部5成为如图3(a)所示那样的开放端稍稍张开的状态，也成为如图3(b)所示那样的、与挤扁了的端部4略相等宽度的扁形。
如图4所示，管体1的突出端部5在被夹具9挟扁了的状态下，用正上方的加热器10放射加热，直至管体1的合成树脂材料溶融。
由于用该加热器10加热，突出端部5的合成树脂成为半溶融状态，在重力作用下成为滴下状地往塌下方向变形，但由于铝箔层3e保持着自已的形状，所以如图5所示，对该铝箔层3c的附着力使得该溶融树脂只稍稍塌下一些，而没有很大地滴落。
用该加热器10对突出端部5的加热处理，其加热温度及加热时间应根据构成管体1的合成树脂的特性及构造进行调节，一般来说，应将突出端部5的上端部加热到180～250度，加热时间为8～10秒。
当加热器10对突出端部5的加热处理结束时，如图6所示，将该突出端部5与夹具9一起放入挤压成形装置11内，由挤压成形装置11快速地挤压成形为所需形状的密封部8。
挤压成形装置11由阴模夹具13和阳模夹具12构成。阴模夹具13可在一方夹具9上沿挟扁方向滑动，在与突出端部5相对的前面，具有与突出端部5相等或稍大宽度的凹状成形模面。阳模夹具12可在另一方夹具9上沿挟扁方向滑动，在与突出端部5相对的前面具有凸状的成形模面，该凸状成形模面可无阻碍地紧密嵌入阴模的成形模面内。
图示实施例中，阳模夹具12和阴模夹具13的成形模面宽度设定成与被挤扁了的端部4的宽度相等，所形成的成形模空间具有这样的形状：其平坦顶面的两侧部分倒角成光滑的圆弧形。
阴模夹具13形成的成形空间具有这样的形状：把突出端部5插入该成形空间内时，成形模面的周面部分与突出端部5的铝箔层3c的周端缘之间形成的间隙可以供合成树脂材料侵入，由于突出端部5的铝箔层3c在挤压成形时不流动变位，所以实际的成形空间是挤压成形装置11所形成的成形模面与铝箔层3c之间的空间。
用该挤压装置11进行密封部8的挤压成形时，突出端部5在约30kgf的挤压力作用下，在挤压同时冷却而被挤压成形为密封部8。密封部8的体积约为突出端部5体积的0.65～0.80，在此范围内可任意地控制密封部8的成形挤压行程。
用挤压成形装置11对密封部8的挤压成形时间约为0.5秒，通过该挤压成形操作，密封部8的树脂温度被冷却到60～80度左右，成形了的密封部8脱离挤压成形装置11后，由吹冷却空气等方法冷却到常温。
图7表示用图6所示挤压成形装置11成形的密封部8的外观形状。密封部8不从端部4向侧方突出，而是圆滑地连续地将其两侧端缘倒角成圆弧状，将上端缘形成为直线形的平坦边缘，由于实际的成形空间是挤压成形装置11的成形模面与突出端部4的铝箔层3c之间的空间，所以密封部8的铝箔层3c完全被合成树脂材料复盖着。
图7所示实施例中，在将突出端部4挤压成形为密封部8之前，为了除去两突出侧端角部6的铝箔层3c，先将突出端部5的两突出侧角部6折叠或切去而形成倒角7，这样可用较大的曲率半径将成形后的密封部8两侧端缘部分倒角成为圆弧状，同时能尽可能地减小用于倒角成该圆弧形的成形空间的容积，在密封部8的挤压成形时，可切实地阻止短劣成型的产生。
将该突出端部4的两突出侧端角部6折叠或切去的倒角7的处理，可以在突出端部4挤压成形密封部8之前进行，何时实施该倒角7的处理并无限定，但是用折叠方法进行倒角7的处理时，必须在突出端部5的合成树脂已失去刚性的状态即突出端部4被加热后进行。
另外，在把突出端部5挤压成形为密封部8时，合成树脂材料在挤压力作用下流动地移动并复盖铝箔层3c，同时形成密封部8的外观形状。该合成树脂材料的主体是外装薄片2、叠层铝箔片3的外皮层3a和挤压层3b，它们的总计厚度为管体1厚度的75～77％，所以，在密封部8的挤压成形时，几乎不必耽心产生短劣成型。在不施行倒角7的处理时，或者根据所需密封部8的外观形状，要加大突出端部5的铝箔层3c与挤压成形装置11的成形模面之间的成形空间容积时，也可以增大外装薄片2的厚度(为了不降低管体1的使用手感，外装薄片2的厚度上限最好为500μ)。
上述构造的本发明有以下效果。
由于将突出端部挤压成形为密封部的挤压成形空间是设定成一定形状的空间，所以，可将成形后的密封部外观形状限制为一定的形状，可确保具有商品性的管体外观形状，可稳定管体的商品价值。
由于可将挤压成形空间设定为所需形状，所以，可将成形后的密封部外观形状做成不刮手指或皮肤的光滑表面，得到使用上安全性提高的管体。
由于将突出端部挤压成形为密封部的挤压成形空间的形状可自由地设定为所需的形状，所以成形后的密封部的外观形状可以做成为有趣味性的形状，能得到外观好、有趣味性的、商品价值高的管体。
由于成形后的密封部其铝箔层完全切实地被合成树脂材料复盖，所以，能切实防止铝箔层的腐蚀，能长期地发挥安全、稳定的密封部的密封功能。
由于密封部在密闭的挤压成形空间内用高压挤压成形，构成该密封部的合成树脂材料被挤压成形时挤压力压缩而密度增大，所以，密封部的溶接强度增高，可发挥高密封强度。

Claims (4)

1.一种铝箔叠层管体的密封部成形方法，其特征在于，用夹具(9)将铝箔叠层管体(1)的端部(4)挟扁，将该管体(1)的突出于夹具(9)的突出端部(5)的合成树脂材料加热溶融，将该加热溶融合成树脂的突出端部(5)放入挤压成形空间内，挤压成形为所需形状的密封部(8)，上述挤压成形空间在该突出端部(5)的铝箔层(3c)与成形模面之间，形成有供突出端部(5)的溶融状合成树脂侵入的间隙。
2.如权利要求1所述的铝箔叠层管体的密封部成形方法，其特征在于，在突出端部(5)挤压成形为密封部(8)之前，将突出端部(5)的两突出侧端角部(6)用折叠或切去的方法形成为倒角(8)的形状。
3.一种铝箔叠层管体的密封部成形装置，其特征在于，由一对夹具(9)、加热器(10)和挤压成形装置(11)构成；夹具(9)将铝箔叠层管体(1)的端部(4)挟扁；加热器(10)对突出于夹具(9)的上述端部(4)的突出端部(5)加热，使该突出端部(5)的合成树脂材料溶融；挤压成形装置(11)将上述加热溶融了合成树脂的突出端部(5)挤压成形为所需形状的密封部(8)。
4.如权利要求3所述的铝箔叠层管体的密封部成形装置，其特征在于，挤压成形装置(11)由阴模夹具(13)和阳模夹具(12)构成；阴模夹具(13)可在一方夹具(9)上沿挟扁方向滑动，在与突出端部(5)相对的前面，具有与突出端部(5)相等或稍大宽度的凹状成形模面；阳模夹具(12)可在另一方夹具(9)上沿挟扁方向滑动，在与突出端部(5)相对的前面具有凸状的成形模面，该凸状成形模面可以不产生毛边无阻碍地紧密嵌入阴模(13)的凹状成形模面内。
CN96190414A 1995-04-28 1996-04-26 铝箔叠层管的密封部成形方法及密封部成形装置 Expired - Fee Related CN1069280C (zh)

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