CN1219901A - 用于生产分隔容器的方法 - Google Patents

用于生产分隔容器的方法 Download PDF

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CN1219901A
CN1219901A CN97194860A CN97194860A CN1219901A CN 1219901 A CN1219901 A CN 1219901A CN 97194860 A CN97194860 A CN 97194860A CN 97194860 A CN97194860 A CN 97194860A CN 1219901 A CN1219901 A CN 1219901A
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preform
inwall
activation
container
adhesive
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I·瓦利伊·埃默里
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Pepsico Inc
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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
    • B29C66/61—Joining from or joining on the inside
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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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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Abstract

一种用于生产分隔容器的方法,该方法包括以下步骤:提供具有内表面(28)的预型件;分别地形成用于插入预型件的内壁(32);将内壁(32)插入预型件中;将预型件和内壁(32)模压成分隔容器;在制备步骤中,使粘合件(39)活化,以便将内壁(32)固定到预型件的内表面(28)上。一种用于形成分隔容器的系统,包括:围绕空腔(26)之内表面(28)的预型件;用预型件分离地形成的内壁(32),内壁(32)包括粘合件(39),用于当加热时将预型件固定到其上;以及用于将预型件模压到所述容器的模压装置上。

Description

用于生产分隔容器的方法
发明背景
本发明涉及用于模压容器的方法，更具体地讲，涉及用于用预型件和分离形成的内壁模压分隔容器的改进的方法，其中，在模压容器之前将内壁固定到预型件上。
分隔容器以及用于生产该容器的方法是众所周知的技术。在大多数情况下，用预型件形成分隔容器，预型件与所需的分隔部分或壁等为整体形成，用以形成最终成品容器的分隔部分。就是说，一般情况下，需要复合模具进行注模压，而且，形成具有伸过其空腔的整体分隔部分的预型件。另外，可以形成简单的预型件使其具有中空的空腔以及可随后固定其中的分离形成的分隔部分。在这些情况下，将分隔部分固定到预型件的内表面是有问题的，即，在随后的用于形成容器的吹模压操作的过程中必须使分隔部分保持与预型件的内表面接触。在模压以及与预型件内表面固定过程中除了防止膨胀以外，在容器形成之后必须使分隔部分与容器的内表面也保持可靠地接触。形成分隔容器的另一种方法是模压包括分隔部分在内的一个结构的整体容器。通常，这种方法需要多个大的和复杂的注压模具。
现有技术包括多种分隔容器，其中没有一个解决如上所述的在形成分隔容器中形成的问题。
由Valyi申请的US5,398,828公开了一种包括内支承和把柄的吹模压容器。吹模压容器包括至少一种与主体部分内表面成一体的内支承件，以便对主体部分进行支承。主体部分限定通过凹处连接在一起的凸起部。该凹处形成手柄。凹处由内支承件支承。内支承件在模压预型件过程中使内支承件与预型件一起形成，然后将其吹模压成容器的内部构件。
由Eales申请的US5,135,823公开了一种定型分隔的吹模压容器，该容器包括分隔构件，用于在容器中形成分隔间，它首先形成用于容器的模具的部分，当模压完成时，分隔构件形成部分容器，容器的模制塑料基本围绕分隔构件。在另一实施例中，容器是定型的，其中，在分离容器部分的面壁内形成配合连接件，分离容器部分经随后的模压而接合。可以将容器部分制成可拆分的或永久固定的。因此，在模压容器过程中，形成分隔部分，其中，分隔部分为模具的一部分，该分隔部分用于形成容器的一部分。
由Nakamura申请的US5,232,108公开了一种具有内分隔壁的预型件和由其制备塑料容器的方法，该容器具有内分隔壁。预型件具有内分隔壁，它伸过预型件柱体部分的内部，并从其底部向上。在形成过程中内分隔壁与预型件的剩余部分一起注模压。之后，将同一壁吹模到用于容器的分隔部分中。
由Jaarsma申请的US4,277,000公开了多分隔容器。该多分隔容器包括模压主体和固定到其上的模压盖，该模压主体包括形成空间的密封壁，在空间和底部内内分隔壁形成分离的分隔间。通过容器主体的密封壁和内表面形成流体密封。整个容器由注模压形成，包括形成分隔壁。
由Lucus申请的US4,065,536公开了一种制备精密分隔的球形容器的方法。该容器由预型件形成，在形成预型件过程中，预型件具有在其中整体形成的分隔部分。因此，分隔部分与预型件的剩余主体部分为一体。
PCT/GB89/01362公开了一种分隔塑料容器，该容器由注模压预型件形成，其中，预型件具有在其中主体形成的分隔部分，该分隔部分也在注模压过程中形成。然后，将预型件和分隔部分吹模压成在其中具有分隔部分的容器形状。
因此，需要一种用于形成分隔容器的改进方法，该方法可以使用简单的预型件并且提供用于将分别形成的分隔部分与其固定可靠元件，从而在容器的形成过程中保持固定状态，在形成之后固定在容器上。发明概述
本发明的第一个目的是提供一种用于形成分隔容器的改进方法。
本发明的另一个目的是提供一种用于形成分隔容器的方法，其中，该分隔容器由预型件形成，该预型件包括牢固地固定在其中的分离形成的内壁。
本发明的再一个目的是提供一种用于形成分隔容器的改进方法，该分隔容器由预型件形成，该预型件包括分别形成的内壁，用热活化粘合剂将内壁固定粘接到预型件和容器的内表面上，在预型件模压制备之前和/或过程中将粘合剂活化。
用于生产本发明的分隔容器的方法可以获得上述的目的和下述的优点，本发明包括以下步骤：提供具有内表面的预型件；分别地形成用于插入预型件的内壁；将内壁插入所述预型件中；将预型件和内壁模压成分隔容器；以及在制备步骤中，使固定件活化，以便将内壁固定到内表面上。
通过用于形成本发明的分隔容器的系统也可以获得本发明的目的和优点，该系统包括：形成空腔之内表面的预型件；用所述预型件分离地形成的内壁，内壁包括固定件，用于当加热时将预型件固定到其上；以及用于将预型件模压到容器的元件。其中，在用模压元件将预型件模压到容器上的制备过程中，加热预型件和内壁，使固定件活化，从而，将内壁固定到内表面上。
下述说明和附图列出了本发明的细节，其中，相同标号表示相同元件。附图的简要说明
图1是根据本发明的原理用于形成分隔容器之方法的示意图；
图2是根据本发明的原理用于图1所示方法的预型件的立面图；
图3是一内壁的透视图，该内壁用于图2所示的用于图1的方法的预型件；
图4是沿图2中的线4-4取的放大截面图；
图5是根据本发明方法形成的一容器实例的透视图；以及
图6是类似于图4所示但为另一实施例的截面图。优选实施例的详细说明
现在详细参见附图，图1示出了用于形成分隔容器之方法的示意图，该方法用10表示。该方法主要包括：步骤12，模压或提供预型件；步骤14，分离地形成用于插入预型件的内壁；步骤16，将内壁插入预型件的空腔内；步骤18，制备用于模压的预型件以及将内壁固定到预型件内表面上；以及步骤20，模压预型件和内壁成分隔容器。以下详细说明这些加工步骤。
参见图2，步骤12中，根据已知方法形成预型件21，即优选注模压，使其具有已知的形状，包括一主体部分22和一螺纹和/或凸缘部分24，部分22和24形成了由内表面28所包围的空腔26。如图2和4所示，内表面28开有槽30a和30b，该槽纵向延伸用于接收内壁32。
参见图3和4，步骤14中，内壁32由预型件21分离地形成，其大小适于预型件21的空腔26。内壁32优选为纵向和矩形状，具有用于分别插入槽30a和30b中的接触边缘34a和34b，而且内壁32包括表面35a和35b。如图2-4所示，内壁32大小适于预型件21的空腔26，而且伸过空腔26，从而形成两个分隔间36和38。
步骤16中，内壁32插入预型件21的空腔26内，进入槽30a和30b中，如图3所示。
步骤18中，用吹模法加热制备预型件21，从而将内壁32固定到预型件21的位于槽30的内表面28上。该步骤优选的是通过使用加热元件(未示出)和热活化的粘合剂39实现，粘合剂39涂敷在内表面32上，如图4所示。优选涂敷在边缘34a和34b上，更优选的是涂敷在位于区域40a和40b至少部分表面35a和35b上，紧靠边缘34a和34b。粘合剂39也可以伸过整个表面35a和35b。
因此，当在步骤18中，加热预型件进行吹模压时，粘合剂39被活化，从而将位于边缘34a和34b以及纵向区域40a和40b的内壁32固定到形成于预型件21中的槽30a和30b的壁上。内壁一旦固定到预型件21的内表面28上时，就实现了吹模的实际步骤，即步骤20，从而使内壁32伸过所形成容器的整个直径。
因此，粘合剂39应具有在吹模制备温度范围内被有效活化的温度活化范围。所谓活化是指粘合剂可以变粘稠、熔融或化学活化，以便引起粘合到预型件21的内表面28上。现有技术中已知具有这些特性的多种粘合剂，因此可使用任何这种粘合剂，而所选的特殊的一种取决于所选模制材料的制备要求。对于某些粘合剂要完成活化和可靠粘合可以在实际模压过程中进行。
在步骤20中，如图5所示，优选的是采用现有技术中已知的吹模技术将预型件21模压入分隔容器41中。在吹模或类似方法期间以及在使用PET(聚对苯二甲酸乙二醇酯)情况下，模压温度一般为95-110℃，在其范围内，所选的粘合剂39优选的为活化的。
因此，由此形成的图5所示的容器41具有可靠地固定在其内的一内壁。优选的是，即使无需要，内壁的长度不延伸至容器的主体部分的全长，如图所示，允许液体在内壁下流过。另外，如果需要，内壁可从底部至颈部伸过容器的全长，以便形成分离的自容的分隔间。例如，可使用内壁做游戏或显示广告之类的东西，或用于支承整体把柄，或用于形成分离的分隔间。
还有，参见步骤8和图6，示出了用于增加预型件21的内壁32和内表面28之间的结合强度的另一个内壁32的实施例。在这个实施例中，使内壁32的端部形成进入钩状件42a和42b中，其外表面包括边缘34a和34b。通过形成进入钩状件42a和42b的纵向延伸的内壁32的端部来获得扩大的表面区域44a和44b，以便提高固定到槽30a和30b的表面的固定强度，所述表面区域44a和44b由钩状件的外表面所限定并包括边缘34a和34b。在该实施例中，优选将粘合剂39喷在钩状件42a和42b的整个外表面44a和44b上，钩状件42a和42b的大小优选为正好分别适合于槽30a和30b中。因此，在加热和吹模制备期间和/或压模期间，当粘合剂39被活化时，钩状件42a和42b的整个外表面44a和44b分别粘合到槽30a和30b的表面上，从而使预型件21的内壁32和内表面28之间获得较强的连接。
虽然以上示出的内壁仅有两个表面，只能用于形成两个分隔间，应当理解可以使用各种形状的内壁，例如，具有多于两个表面的内壁，以便在容器41内形成任意数量的分隔间。就是说，采用这里所述的方法也可以使用具有类似于和平标志或加号之内侧的截面的内壁，用于形成分别具有三个或四个分隔间的容器。也可以使用用于形成甚至更多的分隔间的各种其它形状。对于这些实施例，可以使用相同的槽和粘合结构，以便使内壁与预型件以及内壁与容器之间获得牢固结合。
本发明的第一个优点是提供一种用于形成分隔容器的改进方法。本发明的另一个优点是提供一种用于形成分隔容器的方法，其中，分隔容器用预型件形成，该预型件包括牢固固定在其中的分别形成的内壁。本发明的再一个优点是提供一种用于形成分隔容器的改进方法，该容器由预型件形成，预型件包括分别形成的内壁，用热活化的粘合剂可以将内壁牢固地粘合在预型件的内表面上，在模压预型件成容器之前和/或期间，将粘合剂活化。
应当理解本发明不仅限于这里所示的和给出的说明，这些说明只能理解为实施本发明的最佳方式，毫无疑问可以改变部件的形状、大小和设置以及操作的步骤。本发明包括所有落入本发明精神内的和由权利要求书所限定的范围内的这类改动。

Claims (20)

1．一种用于生产分隔容器(41)的方法，该方法包括步骤：
提供具有内表面(28)的预型件(21)；
分别地形成用于插入所述预型件(21)的内壁(32)；
将所述内壁(32)插入所述预型件(21)中；
将所述预型件(21)和内壁(32)模压成所述的分隔容器(41)；
在所述的制备步骤中，使粘合件(39)活化，以便将所述的内壁(32)固定到所述的内表面(28)上。
2．根据权利要求1的方法，还包括将所述预型件(21)与所述内壁(32)结合的步骤。
3．根据权利要求2的方法，其中，所述的内表面(28)包括多个用于进行所述的结合步骤的槽(30a,30b)。
4．根据权利要求3的方法，其中，所述的内壁(32)具有一长度，所述的槽(30a,30b)伸过所述长度的基本部分。
5．根据权利要求1的方法，其中，所述的制备步骤包括加热所述的预型件(21)的步骤。
6．根据权利要求5的方法，其中，所述的固定件包括热活化的粘合剂(39)，其中所述的活化步骤包括在所述的加热过程中使所述的热活化粘合剂活化，以便将所述的内壁(32)固定到所述的内表面(28)上。
7．根据权利要求2的方法，其中，所述的结合步骤是通过所述的内壁(32)实现的，包括用于结合所述内表面(28)的纵向延伸的侧面。
8．根据权利要求7的方法，其中，所述的纵向延伸的侧面包括边缘(34a,34b)，所述的边缘为卷曲边缘，以便增加与所述的内表面的结合。
9．根据权利要求1的方法，其中，所述的内壁(32)是伸长的基本为平面的内壁，以便伸过所述预型件(21)的直径。
10．根据权利要求1的方法，其中，所述的模压包括吹模压所述预型件(21)的步骤。
11．根据权利要求1的方法，其中，所述的插入步骤包括将所述的内壁(32)滑动进入形成于所述内表面(28)的槽(30a,30b)中的步骤。
12．根据权利要求1的方法，其中，所述的提供步骤包括注模压所述预型件(21)的步骤。
13．根据权利要求12的方法，其中，所述的固定件包括热活化的粘合剂(39)，所述的活化步骤包括使所述的热活化粘合剂变成为粘稠的、熔融的或化学活化中的至少一种，以便于固定。
14．一种用于形成分隔容器(41)的系统，包括：
围绕空腔(26)之内表面(28)的预型件(21)；
用所述预型件(21)分离地形成的内壁(32)，所述的内壁(32)包括固定件(39)，用于当加热时将所述的预型件固定到其上；以及
用于将所述预型件(21)模压到所述容器(41)的元件，
其中，在用所述的模压元件将所述的预型件(21)模压到所述的容器(41)上的制备过程中，加热所述的预型件(21)和内壁(32)，使所述的固定元件活化，从而，将所述的内壁(32)固定到内表面(28)上。
15．根据权利要求14的系统，其中，所述的预型件(21)包括用于接收所述内壁(32)的元件，使所述的接收元件形成于所述的内表面(28)内。
16．根据权利要求15的系统，其中，所述的接收元件包括形成于所述的内表面(28)内的槽(30a,30b)。
17．根据权利要求15的系统，其中，所述的内壁(32)包括边缘(34a,34b)，用于结合所述的接收元件，所述的边缘包括所述的固定件。
18．根据权利要求17的系统，其中，所述的边缘(34a,34b)为卷曲的，用于形成较大的表面，以便与所述的接收元件相接触。
19．根据权利要求14的系统，其中，所述的固定件包括热活化粘合剂(39)。
20．根据权利要求14的系统，其中，所述的预型件(21)由聚对苯二甲酸乙二醇酯形成，所述的固定件包括热活化粘合剂(39)，在用聚对苯二甲酸乙二醇酯形成的用于模压的所述预型件(21)所需的加热时，所述的热活化粘合剂变为活化的。
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