CN1847100A - 隔热容器、其制造方法及用于其制造的装置 - Google Patents

隔热容器、其制造方法及用于其制造的装置 Download PDF

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CN1847100A
CN1847100A CNA2005101234727A CN200510123472A CN1847100A CN 1847100 A CN1847100 A CN 1847100A CN A2005101234727 A CNA2005101234727 A CN A2005101234727A CN 200510123472 A CN200510123472 A CN 200510123472A CN 1847100 A CN1847100 A CN 1847100A
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詹弗兰科·德阿马托
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Abstract

本发明涉及一种用于热饮等的隔热容器，其包括：内杯，其具有大体截头圆锥形的杯体；外壳，其大体为截头圆锥形；热密封塑料涂层，其位于所述外壳内侧和所述杯体外侧的至少一个上，所述杯体放置在所述外壳内部，从而所述涂层至少沿着靠近外壳上边缘的接触轨迹延伸，所述杯体的外表面和所述外壳的内表面沿着该接触轨迹相接触。本发明旨在提供具有改进隔热性能的容器。通过用于将所述外壳用所述塑料涂层结合到所述杯体上的至少一个结合点和/或结合区域来实现该目的，其中所述塑料涂层仅局部形成在所述接触轨迹内。

Description

隔热容器、其制造方法及用于其制造的装置
技术领域
本发明总体上涉及容器。本发明具体地涉及用于热饮等的隔热容器、制造这种容器的方法、以及用于制造这种容器的装置。
背景技术
在现有技术中已经有许多具有隔热特征并用于例如咖啡、茶、汤等的热液体的容器的示例。可以在US-A-2,266,828，US-A-4,007,670，US-A-5,145,107，US-A-5,460,323，US-A-5,524,817，US-A-5,685,480和US-A-6,663,926中找到这些示例。这些容器的每一个都包括由气隙隔开的内杯体和外壳。在这种现代容器中，杯由薄纸板制成，并在其内侧涂覆有聚乙烯树脂等。通过将杯和外壳在顶部和底部的关键位置粘合，或者在近来的示例中通过热密封而将它们固定在一起。可以通过各种结构的垫片来保持位于杯体壁和外壳之间的气隙。
发明内容
本发明的一个目的在于提供改进的隔热容器、制造该隔热容器的方法以及用于制造该容器的装置，从而可以通过改进的结合方法以简单的方式来改进杯和外壳之间的结合。
前述和其它目的将通过具有第一方面特征的隔热容器、具有第十方面特征的制造这种容器的方法，或者具有第十五方面特征的用于结合的装置来实现。
热密封塑料涂层设置在所述外壳内侧或所述杯体外侧的至少一个上，并且在对涂层进行加热并且将杯体放置在外壳内之后，在相应的接触轨迹内仅局部地形成用于通过塑料涂层将所述外壳与所述杯体结合的至少一个结合点和/或结合区域。该“接触轨迹”大体是虚拟的接触轨迹，在将杯放置在外壳内时，杯体的外表面可与外壳的内表面在该接触轨迹处接触。然而，不需要在外壳和杯体的相应壁之间沿着它们的整个周边存在实际的接触，而是接触轨迹可以仅沿周边部分地延伸，其中相应的结合点和/或结合区域位于该接触轨迹内。上述结构仅通过相应的方法局部形成，其中外壳和杯体壁至少在这些结合点中的一个和/或这些结合区域中的一个处被挤压在一起，所述结合点和/或结合区域位于所述接触轨迹内。
由于相应的热密封塑料涂层在将杯插入外壳之前熔化，因此杯和外壳会在涂层硬化后通过该涂层在相应的结合点和/或结合区域处结合在一起。
当然，接触轨迹也可以是环形轨迹，它也可以完全环绕杯体和外壳，并可以沿垂直方向有一定的延伸，该垂直方向是指垂直于相应的周向方向。
仅使用一个结合点或结合区域已经足够，因为它们仅用于防止在用于装配、包装、嵌套等的容器操作期间丢失内杯体。在将相应的热饮等填充在容器中之后，内杯体将主要通过相应饮料的重量而保持在外壳内，从而仅需要相应的结合点或结合区域提供非常小的结合力。
但是，还可以通过例如设置许多沿接触轨迹形成的结合点和/或结合区域，以更加牢固地将杯体和外壳彼此固定，所述结合点和/或结合区域通过所述接触轨迹的未结合部分彼此分开。而且，结合点和/或结合区域可以在水平和/或垂直方向上并排且彼此分开地设置在接触轨迹内。这意味着单个结合点或结合区域在水平或垂直方向上设置，或者通过这些例如在垂直方向上设置的结合点或结合区域形成组，并且这些组在水平或周向方向上并排设置。
可以将相应的结合点和/或结合区域设置成沿周向方向不均匀地分布。为了改善容器的装配和制造该容器的相应方法，当相应的点或区域均匀分布时是有利的。
相应的隔热容器在容器下部分中在杯壁和外壳壁之间具有间隙，并且通常应在没有任何热传递连接的情况下保持该气隙。因此有利的是，在杯体的环形上壁部分和所述外壳的上部基本呈筒形的部分之间形成相应的接触轨迹。在容器的这个部分，相应的间隙不是必需的，因为接触轨迹设置成高于填充在容器中的饮料的高度。
还可以将所述结合点和/或结合区域设置成紧靠着杯体的所述环形上壁部分的下边缘，在该处形成上台肩。所述间隙将从该上台肩的下方开始。
不同的材料可以用于外壳或杯，其中两者中的至少一个可由相应的塑料材料制成。由于重复利用的原因，杯和/或外壳也可以由纸板制成。为了获得至少杯的足够的液体密度，用于形成杯的相应纸板涂覆有上述聚乙烯树脂等。当然，纸板也可以涂覆有热密封塑料涂层，其中该涂层可以设在杯壁外侧、外壳壁内侧，或者也可以设置在这两个壁上。
相应的结合点或结合区域可具有不同的形状。例如，结合点可具有圆形、矩形或其它形状的横截面。相应的结合区域可具有短条纹的形式，其中所述条纹可水平设置或也可相对于周向方向倾斜。
为了熔化相应的塑料涂层，仅对其局部加热已经足够，但是也可以例如完全加热作为环形带的塑料涂层。
为了获得足够的力以将杯壁和外壳壁挤压在一起直到热密封塑料涂层再次硬化，可以将带有至少一个径向可移动或突起的挤压元件的环形第一部件定位在杯体内部，该挤压部件压靠在外部第二部件上，从而通过这两个部件将杯体壁和外壳壁压在一起，以形成一个或多个结合点和/或结合区域。当然，相应的挤压部件也可以是外部第二部件的一部分，或者挤压部件由第一部件和第二部件提供。
这样的挤压部件也可以不与容器的其中一个壁直接接触，而是它们使得例如环形柔性环从内侧变形，并且该环在其外侧上的变形部分与其它部件配合将杯体壁和外壳壁压在一起。
用于将外壳和内杯结合以形成用于热饮等的隔热容器的相应装置包括：所述第一部件，其设置在内杯体的内部；所述第二部件，其大体与所述第一部件同心，并设置在外壳的外部；以及至少一个径向凸起或可移动的挤压部件，其将相对的外壳壁和杯体壁压在一起，以沿着外壳和杯体的周边形成一个或多个结合点和/或结合区域。
第一部件可以是插入杯体内的环形环或盘。该环形环或盘可支承相应的(一个或多个)挤压部件，以使得它们可沿径向方向移动。
这种可移动的挤压部件的简单实施例是由所述第一和/或第二部件可移动支承的柱塞。
为了获得均匀分布的结合点或结合区域，相应数量的径向可移动挤压部件也沿着第一或第二部件的周边均匀分布。
为了在将杯体插入之前设置外壳，有利的是，所述装置包括接收部件，该接收部件至少具有裙部和用于保持外壳的上凸缘。
为了使相应的接收部件还用作第二或外部部件，反压延伸件也可以沿大致垂直方向从接收部件的上凸缘延伸。这样，相应的可移动挤压部件可以是第一或环形部件的一部分，并且不需要第二和单独部件。
也可以使用接收部件将杯体保持在预定的位置，其中这可以通过反压延伸件的上端来实现，该反压延伸件用作杯体外卷曲部分的底座。
附图说明
本发明包括该容器结构、其制造方法和相应的制造装置，将在附图中或多或少地对本发明进行图解说明，附图中：
图1是隔热容器的侧视图，其包括内杯和外壳，并实施了本发明的第一形式；
图2是图1的容器的仰视图；
图3是图1中容器的侧视图，其中容器的元件为垂直剖面图形式；
图4是穿过图1的容器的外壳顶部的放大垂直剖面图，表示了第一容器装配步骤；
图5是与图4类似的视图，表示将杯插入外壳中；
图6是与图4类似的视图，表示在进一步的容器装配步骤中外壳和杯的点焊；
图7是容器和用于点焊的相应工具或装置的俯视图；
图8是根据本发明罩有图7的用于点焊的工具的容器的立体图；
图9是与图3类似的隔热容器的视图，其实施了本发明的第二形式；
图10是与图4类似的第二容器实施例的视图，表示了第一装配步骤；
图11是与图5类似的第二容器实施例在进一步装配步骤中的视图；以及
图12是与图6类似的第二容器实施例的视图，表示了进一步的装配步骤。
具体实施方式
下面参照附图，特别是图1至图3，实施了本发明第一形式的特征的热饮容器大体用附图标记10表示。根据本发明，该容器包括套在一起并彼此点结合(spot bond)的内杯体12和外壳14。
根据图3，内杯体12包括以传统方式分别由纸板形成的杯体22和杯底24。在制造前，在纸板一侧上涂覆有热密封塑料材料，例如聚乙烯等。于是装配好的杯12在其内表面的全部或一部分上具有聚乙烯的内涂层15。
杯体22的截头圆锥形壁29具有从其靠近杯底24处向内形成的环形台肩31。该台肩31用作在堆叠杯子时上方紧接的杯子的止挡件。
杯底24以图中所示的方式位于杯体22中。杯壁29下边缘的部分26向内并向上折叠，从而捕获杯底24的向下延伸的环形裙部28。
杯体22还具有环形上台肩32，该台肩32从杯体22的截头圆锥形侧壁29向外形成，并距外卷曲部分34向下5mm或更大的长度，所述外卷曲部分形成杯体的上边缘。在台肩32和卷曲部分34之间设置有带有环形外表面38的上壁部分37，也见图5，其中该表面在台肩边缘41处的下部39用作结合点或结合区域1或2，外壳14的环形内表面按照以下描述的方式结合在该结合点或结合区域上。
与杯壁29相似，外壳14为截头圆锥形形状。外壳14由纸板形成，该纸板具有热密封塑料材料的内涂层42。内涂层可遍及外壳14或仅位于沿着外壳14的相应接触轨迹3的结合区域或结合点内，也见图7。外壳14具有形成在其下边缘处的内卷曲部分44(见图3)，该内卷曲部分在杯体12下端的上方与杯底24高度大约相当的距离处，与杯体壁29的外表面4接合。
还见图5，外壳14的环形上边缘9或51与杯体22的卷曲部分34紧邻，并可从下方抵靠着该卷曲部分34。外壳14从那里向下延伸至狭窄的环形表面，在该表面处外壳14在位于台肩32的下边缘41的略微上方处，至少部分地与上壁部分37和环形外表面38接合。
外壳14内的热密封塑料涂层42在杯体12和外壳14装配之前局部熔化。在装配后，外壳14在所示的一个或多个结合点或结合区域1、2(例如，在图6中为焊点53)处进行热结合，在该处外壳14与杯体台肩32或靠近其下边缘41的环形外表面38结合，也就是在距卷曲部分34大约5mm的距离处结合。虽然这里描述了使用三个以一定间隔环状间隔开的焊点53，但是也可以仅用一个或超过三个焊点，并且在使用超过一个焊点时，这些焊点可以不均匀间隔开。
还可以沿垂直方向7设置若干这样的结合点或结合区域(见图3)，或者沿水平方向6或周向方向8并排设置(见图2)。
下面将参照图4至图8，根据本发明，容器10按如下步骤制造：
-通过围绕截头圆锥形的心轴形成，而用纸板制成外壳14，该纸板在内部有选择地涂覆有热密封塑料材料，例如聚乙烯；
-然后将该外壳从心轴上取下，并放置在相应形状的容器或接收部件20内，见图4。该接收部件20包括截头圆锥形的裙部21(见图5)，该裙部21与外壳壁16的外表面相抵靠。在裙部21的上端处，接收部件20具有径向向外延伸的上凸缘23。
在下一步骤中，将环形加热元件抵靠着外壳14的内部进行定位，并且将聚乙烯涂层带加热至其熔点，见图6。
然后通过抽吸将预先装配好的杯体12拉入外壳内，直到其上台肩32的环形周边沿着相应的接触轨迹3在熔化带处座靠在外壳上，也见图7。
然后将作为用于制造相应容器10的相应装置11的第一部件的环形盘17定位在杯体22内，并在上台肩32的上方与杯体内表面紧密接合，例如见图6至图8。
然后将作为相应装置11的第二部件的环形环18在熔化带的高度处围绕外壳14放置，该环18包括三个作为挤压部件19的可径向延伸的柱塞(plunger)，并且这些柱塞延伸从而将外壳壁和杯体壁挤压在一起，直到它们分别在例如三个焊点53或结合点1或结合区域2处结合在一起，例如见图6。这里将这样的焊点称为焊接点(dot weld)，也见图7和图8。
然后将盘和环取下，并将装配好的容器从接收部件20抽出。
根据图6，不需要使上壁部分37与外壳壁16的上端部分的全部相接触，并且可以在两者之间在外卷曲部分34的正下方设置小间隙。见图7，只沿着例如靠近上环形台肩32设置的接触轨迹3，通过将第一部件17和第二部件18挤压在一起以产生相应的结合点或结合区域，见图6和图7。
在图8以及图7中，示出了带有柱塞19的环状第二部件18，其中第二部件18设置在接收部件20的上凸缘23的上表面与外卷曲部分34的下端之间，又见图6。
在图7中，还示出了：作为挤压部件19的相应柱塞沿着围绕容器10的周向方向8均匀分布，并且形成三个结合点或结合区域。相应的挤压部件19可沿移动方向45移动。
下面参照图10至图12，可以看到处于各种装配阶段下大体用附图标记10表示的、实施了本发明第二实施例特征的容器。除了一个特征以外，容器10在构造上与前述容器相同。容器的杯体12与前述杯体相同，但是外壳14具有形成在其上端处的短圆柱形部分50。外壳14的圆柱形部分50座靠在上壁部分37的外表面38上并与之齐平，见前图。杯12和外壳14在作为结合点1或结合区域2的一个或多个点53处点结合在一起，其中结合点1或结合区域2与杯10中的相对应，即围绕紧靠其下边缘41的台肩32。虽然圆柱形部分50在台肩32的上方座靠在杯体12上并与之齐平，但是应当理解的是，部分50并不在结合点53的环的上方与杯体结合，并且相应的结合点或焊点53通过相应的接触轨迹3的未结合部分而彼此分开。
另外，第二实施例的接收部件20与第一实施例的不同，因为其具有整体形成的第二部件18，该第二部件18由从接收部件20的上凸缘23的上表面垂直延伸的反压延伸件25形成。延伸件25的上端27从下方抵靠着卷曲部分34。
根据本发明，杯体10按照下述步骤制造：
-通过围绕具有上圆柱形部分的截头圆锥形心轴形成而由纸板制成外壳，该纸板在内部有选择地涂覆有热密封塑料材料，例如聚乙烯；
-然后将该外壳14从心轴上取下，放置在相应形状的接收部件20内，见图10；
-将环形加热元件抵靠着外壳14的内侧进行定位，并且将聚乙烯涂层带加热至其熔点；
-然后通过抽吸将预先装配好的杯体22拉入外壳14内，直到杯体的台肩31的环形周边在熔化带处座靠在外壳上，见图11；
-然后将作为第一部件17的环形环定位在杯体22的内部并在熔化带的高度处，该环包括例如三个作为挤压部件19的可径向延伸的柱塞，并且这些柱塞延伸从而将外壳壁和杯体壁挤压在一起并靠在外部接收部件20上，尤其靠在相应的反压延伸件25上，直到它们在例如三个点或焊点53处结合在一起，见图12；
-然后将环17取下，并将容器10从接收部件20抽出。
上述的每个容器实施例的特征在于，在其外壳14内部具有热密封塑料涂层，该外壳14在多个焊点53处通过热和压力与杯体12的外表面结合，其中焊点53可以是结合点1或结合区域2。相应的焊点围绕上述部件并在其间延伸。那些焊点位于靠近杯体的上壁部分37的底部边缘或外壳14的上圆柱形部分50的环形轨迹中，参见接触轨迹3。每个容器实施例也可以通过将热密封塑料结合材料在上壁部分37处局部施加杯体的外部来制造，而不脱离本发明。在这样的情况下，当然在将杯插入外壳前，从杯外部加热该结合材料。

Claims (21)

1.一种用于热饮等的隔热容器(10)，其包括：
a)内杯(12)，其具有大体截头圆锥形的杯体(22)；
b)外壳(14)，其大体为截头圆锥形；
c)热密封塑料涂层(42)，其位于所述外壳(14)内侧和所述杯体(22)外侧的至少一个上；
d)所述杯体(12)放置在所述外壳(14)内，从而所述涂层(42)至少沿着靠近外壳(14)的上边缘(9)的接触轨迹(3)延伸，所述杯体(22)的外表面和外壳(14)的内表面沿着该接触轨迹相接触，
其特征在于：
在所述接触轨迹(3)内仅局部形成有至少一个结合点(1)和/或结合区域(2)，用于通过所述塑料涂层(42)将所述外壳(14)与所述杯体(22)结合。
2.根据权利要求1所述的隔热容器，其特征在于，所述接触轨迹(3)为环形轨迹。
3.根据权利要求1或2所述的隔热容器，其特征在于，沿着所述接触轨迹(3)形成多个结合点(1)和/或结合区域(2)，该结合点和结合区域通过所述接触轨迹的未结合部分而彼此分开。
4.根据前述权利要求中任一项所述的隔热容器，其特征在于，所述结合点(1)和/或结合区域(2)沿水平方向(6)和/或垂直方向(7)并排且彼此分开地设置在接触轨迹(3)内。
5.根据前述权利要求中任一项所述的隔热容器，其特征在于，所述结合点(1)和/或结合区域(2)沿接触轨迹(3)的周向方向(8)均匀分布。
6.根据前述权利要求中任一项所述的隔热容器，其特征在于，所述接触轨迹(3)完全环绕所述杯体(22)和外壳(14)。
7.根据前述权利要求中任一项所述的隔热容器，其特征在于，所述接触轨迹(3)形成在所述杯体(22)的环形上壁部分(37)与所述外壳(14)的上部基本圆柱形部分(50)之间。
8.根据前述权利要求中任一项所述的隔热容器，其特征在于，所述结合点(1)和/或结合区域(2)设置成紧靠所述杯体(22)的所述环形上壁部分(37)的下边缘(41)，在该处形成有上台肩(32)。
9.根据前述权利要求中任一项所述的隔热容器，其特征在于，所述杯体(22)和/或外壳(14)由涂覆有所述热密封塑料涂层(42)的纸板制成。
10.一种制造用于热饮等的隔热容器的方法，其包括以下步骤：
a)形成大体截头圆锥形的外壳(14)；
b)将设置在所述外壳(14)内侧和/或在大体截头圆锥形的杯体(12)的外侧上的热密封塑料涂层(42)加热至其熔点；
c)将所述杯体(12)插入所述外壳(14)内，直到杯壁(13)的外侧沿接触轨迹(3)座靠在熔化塑料上，以及
d)在至少一个结合点(1)和/或一个结合区域(2)处将所述外壳和杯体壁(16，13)压在一起，所述结合点和/或结合区域位于所述接触轨迹(3)内。
11.根据权利要求10所述的方法，其特征在于，所述外壳和杯体壁(16，13)压在一起，以形成多个结合点(1)和/或结合区域(2)，从而将所述外壳和所述杯局部结合，所述结合点和/或结合区域沿着所述接触轨迹(3)通过未结合部分而彼此分开。
12.根据权利要求10或11所述的方法，其特征在于，所述塑料涂层(42)是环形带，并且所述带被完全加热。
13.根据权利要求10至12中任一项所述的方法，其特征在于，仅加热所述带(42)的一部分，该部分形成或至少包括所述结合点(1)和/或结合区域(2)。
14.根据权利要求10至13中任一项所述的方法，其特征在于，带有至少一个可径向移动或突起的挤压元件(19)的环形或第一部件(17)定位在杯体(22)内，该挤压元件压靠在外部或第二部件(18)上，从而通过第一和第二部件将杯体(22)与外壳(14)的壁(13，16)压在一起，以形成一个或多个结合点(1)和/或结合区域(2)。
15.一种装置(11)，其用于将外壳(14)与内杯(12)结合以形成用于热饮等的隔热容器(10)，包括：
a)第一部件(17)，其设置在内杯体(12)内；
b)第二部件(18)，其与所述第一部件(17)同心，并设置在外壳(14)的外部；
c)至少一个径向突起或可移动的挤压部件(19)，其将相对的外壳和杯壁(16，13)压在一起，从而沿着它们的周边形成结合点(1)和/或结合区域(2)。
16.根据权利要求15所述的装置，其特征在于，所述第一部件(17)是环形环或盘。
17.根据权利要求15或16所述的装置，其特征在于，所述可径向移动的挤压部件(19)为由所述第一和/或第二部件(17，18)可移动支承的柱塞。
18.根据权利要求15至17中任一项所述的装置，其特征在于，多个所述可径向移动的挤压元件(19)沿着所述第一或第二部件(17，18)的周边均匀分布地设置。
19.根据权利要求15至18中任一项所述的装置，其特征在于，所述装置(11)还包括一接收部件(20)，该接收部件至少具有裙部(28)和用于保持外壳(14)的上凸缘(23)。
20.根据权利要求15至19中任一项所述的装置，其特征在于，作为第二部件(18)的反压延伸件(25)沿基本垂直的方向(7)从上凸缘(23)延伸。
21.根据权利要求15至20中任一项所述的装置，其特征在于，反压延伸件(25)的上端(27)用作杯体(22)的外卷曲部分(34)的底座。
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