CN110065219B - 吹塑瓶、墨盒和用于制造吹塑瓶的方法 - Google Patents

吹塑瓶、墨盒和用于制造吹塑瓶的方法 Download PDF

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Publication number
CN110065219B
CN110065219B CN201910042772.4A CN201910042772A CN110065219B CN 110065219 B CN110065219 B CN 110065219B CN 201910042772 A CN201910042772 A CN 201910042772A CN 110065219 B CN110065219 B CN 110065219B
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flange
recess
inner layer
blow molded
molded bottle
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CN110065219A (zh
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福岛隆史
大桥哲也
井上良二
村上洋纪
宫下岳穗
长冈恭介
小泷靖夫
菅野健一
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Canon Inc
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Canon Inc
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  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Ink Jet (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)

Abstract

本发明涉及吹塑瓶、墨盒和用于制造吹塑瓶的方法。吹塑瓶包括至少两层，所述至少两层包括内层和外层，其中内层包括内层凸缘，外层包括外层凸缘，并且其中在内层凸缘或外层凸缘中的任一者上形成突部，在另一者中形成凹部，并且突部装配至凹部。

Description

吹塑瓶、墨盒和用于制造吹塑瓶的方法
技术领域
本发明涉及吹塑瓶、墨盒和用于制造吹塑瓶的方法。
背景技术
作为模制方法已经知晓诸如在日本专利申请公开No.2017-113933中讨论的注射吹塑模制。在注射吹塑模制中，首先模制试管形的预制件。然后通过将空气吹入加热的预制件中、并且使膨胀的预制件压在模具的内表面上，将预制件模制成所需的形状。
在注射吹塑模制中，通过用拉伸杆纵向地拉伸加热的预制件，然后用加压空气横向地拉伸和膨胀预制件，将加热的预制件模制成所需的形状。根据本发明人进行的研究，如果对具有低耐热性或低结晶度的材料进行注射吹塑模制，则由于拉伸引起的应力松弛，可能在模制制品中发生变形(模制后的收缩)，并且该制品可能无法提供所需的形状。特别地，如果对双层预制件进行吹塑模制并且在变形的部分上设置焊接肋，则不能按设计进行焊接。这会导致不牢的焊接或从该部分发生泄漏。
发明内容
本公开涉及抑制在双层预制件的注射吹塑模制之后由于模制后的收缩引起的变形的发生。
根据本公开的一个方面，吹塑瓶包括至少两层，所述至少两层包括内层和外层，其中内层包括内层凸缘，外层包括外层凸缘，并且其中，在内层凸缘或外层凸缘中的任一者上形成突部，在另一者中形成凹部，并且突部装配至凹部。
参考附图，根据下文对示例性实施例的描述，本公开的其他特征将变得显而易见。
附图说明
图1A、1B和1C是示出了根据本公开的一个或多个实施例的墨盒的构造的图。
图2A、2B和2C是示出了根据本公开的一个或多个实施例的预制件的构造的图。
图3A和3B是示出了根据本公开的一个或多个实施例的墨盒的壳体的构造的图。
图4A和4B是示出了根据本公开的一个或多个实施例的凸缘的构造的图。
图5A和5B是示出了根据本公开的一个或多个实施例的接合构件及其焊接肋的构造的图。
图6A和6B是示出了根据本公开的一个或多个实施例的凸缘的构造的图。
图7A、7B和7C是示出了根据本公开的一个或多个实施例的壳体和凸缘的构造的图。
图8A、8B和8C是示出了根据本公开的一个或多个实施例的壳体和凸缘的构造的图。
图9A、9B和9C是示出了根据本公开的一个或多个实施例的壳体和凸缘的构造的图。
图10A、10B和10C是示出了根据本公开的一个或多个实施例的壳体和凸缘的构造的图。
图11A和11B是示出了根据本公开的一个或多个实施例的壳体和凸缘的构造的图。
图12A、12B和12C是示出了根据本公开的一个或多个实施例的壳体和凸缘的构造的图。
具体实施方式
将通过使用作为吹塑瓶的示例的墨盒来具体地描述根据本公开的示例性实施例的吹塑瓶。根据本示例性实施例的吹塑瓶不限于墨盒。例如，根据本示例性实施例的吹塑瓶可以用作食品或饮料容器或药物容器。
图1A、1B和1C示出了墨盒的一个示例。图1A是墨盒的透视图。图1B是沿图1A的线Z-Z'截取的墨盒的剖视图。图1C是墨盒的分解图。墨盒13包括接合构件1、盖构件2、供给口阀5、弹簧6、空气止回阀7、墨水通道构件8和壳体9。墨水接收管(未示出)插入其中的插入部分4设置在接合构件1的端部处。具有开口的密封构件4a设置在插入部分4上。插入部分4通过利用弹簧6朝向开口偏压供给口阀5而被密封，除了在墨盒13附接至记录装置时之外。形成密封构件4a的材料的示例包括橡胶和其他弹性体。在弹簧6的另一端处，空气止回阀7从壳体9的内部封闭接合构件1的内部空间。空气止回阀7布置成防止空气在从壳体9排出空气的过程中回流，在墨盒13的制造过程中墨水已经注入所述壳体9中。形成空气止回阀7的材料的示例包括聚乙烯(PE)、聚丙烯(PP)和弹性体。
壳体9的内部用作用于保持墨水的墨水保持部分，并且墨水注入到壳体9的内部中。在注入墨水之后，接合构件1接合至壳体9，并且壳体9中的空气通过接合构件1的排气口14排出。然后用膜密封排气口14。这里，空气止回阀7针对壳体9封闭接合构件1，使得在排气过程和膜焊接过程之间空气不会流回到壳体9中。
突部设置在接合构件1上，并且电极部分3设置在突部上。电极部分3旨在与记录装置的连接器引脚接触。盖构件2被附接以覆盖接合构件1。盖构件2具有例如保护接合构件1或特别是电极部分3的功能，并且在附接墨盒13时用作插入引导件。
壳体9是通过注射吹塑模制而模制的部分。壳体9包括两层，即外层10和内层11。外层10是图1B中的实线所示的外层。内层11是图1B中的虚线所示的内层。外层10和内层11可彼此分离。如上所述，墨水保持在内层11内。
在将墨水从墨盒13供应至记录装置时，设置在记录装置上的墨水接收管首先插入至插入部分4中，并且接合构件1的内部被减压。通过减压打开空气止回阀7。然后，壳体9中的墨水经由墨水通道构件8移动到接合构件1中，并经由墨水接收管供应至记录装置。
墨水通道构件8包括两个通道，从而可以以预定的密度供应在竖向上积聚在壳体9中的下部的墨水以及在竖向上位于壳体9中的上部的墨水。形成墨水通道构件8的材料的示例包括PE和PP。
由于墨水被供应并且保持在内层11内的墨水量减少，内层11根据墨水体积的减少而变形。当所保持的墨水最终用完时，内层11塌缩。
在外层10中形成空气连通口12。空气通过空气连通口12进入外层10和内层11之间，使得内层11可以随着墨水被供应而塌缩。外层10包括作为其凸缘的外层凸缘。内层11包括作为其凸缘的内层凸缘。内层凸缘和接合构件1通过热焊接而接合，由此形成封闭空间。下面将详细描述内层凸缘和外层凸缘。
考虑到充分利用墨水，内层11可以由柔软材料制成。考虑到柔韧性，形成内层11的材料的示例可以包括聚烯烃树脂、烯烃基热塑性弹性体和苯乙烯基热塑性弹性体。内层11可以由这些材料中的至少一种制成。如果通过注射吹塑模制同时模制内层11和外层10，则内层11的形成材料可以是具有与外层10的形成材料的温度范围类似的、适合于吹气的温度范围的形成材料。具体地，可以使用至少PE或PP。考虑到柔韧性和注射吹塑性，在PE中特别地可适合于使用线性低密度聚乙烯(LLDPE)。内层11的弯曲模量可以是1000MPa或更低，理想地是300MPa或更低。
外层10是墨盒13的外部构件，并且用作外侧构件。因此，外层10具有的刚度可以高于内层11的刚度，并且可以由具有高刚度的材料制成外层。形成外层10的材料也可具有高的注射吹塑性。具体地，可以使用选自包括聚对苯二甲酸乙二醇酯(PET)、聚萘二甲酸乙二醇酯、或聚对苯二甲酸丁二醇酯的组的PE树脂。特别地可适合于使用PET。当通过吹气拉伸时，PET的粘度特征性地急剧增大。被拉伸的薄部然后变得不那么可拉伸，而未拉伸的厚部是可拉伸的。结果，整个制品可以拉伸成具有均匀的厚度。
接下来，将描述用于制造墨盒13的壳体9(作为吹塑瓶)的方法。墨盒13的壳体9通过注射吹塑模制两层预制件(包括用于外层10的一层和用于内层11的一层)而制造。
图2A至2C示出了用于模制壳体9的预制件15。图2A和2B是从各个不同角度观察的预制件15的视图。图2C是沿图2A的线A-A'截取的预制件15的剖视图。预制件15是层压预制件，其包括作为内层11的内层预制件16和作为外层10的外层预制件17的叠层。内层预制件16和外层预制件17可以是一起模制或单独模制的嵌件。内层预制件16和外层预制件17可以通过嵌入模制而适当地模制。原因在于可以增大内层凸缘20和外层凸缘18之间的粘附性(摩擦系数)以进一步抑制由于模制后的收缩引起的吹塑模制的内层11的变形。下面将详细描述内层11(内层凸缘20)的变形。
如图2C所示，预制件15包括非吹塑部分24a和吹塑部分25a。非吹塑部分24a是在注射吹塑模制前后基本上不改变形状的部分。吹塑部分25a是模制成瓶形状的、并在注射吹塑模制前后改变形状的部分。预制件15的非吹塑部分24a成为吹塑瓶的形状基本不变化的非吹塑部分。预制件15的吹塑部分25a改变形状并变为吹塑瓶的吹塑部分。
在制备形成为两层的预制件15之后，将预制件15放置在吹塑载体上。然后通过加热器加热预制件15的吹塑部分25，使得内层预制件16的吹塑部分和外层预制件17的吹塑部分均达到或超过其玻璃化转变温度。然后，通过使用插入模具中的拉伸杆，沿着拉伸方向26拉伸(伸长)预制件15的内部。同时，将约30个大气压的空气吹入预制件15中，以将预制件15模制成所需的吹塑瓶(壳体)形状。
考虑到吹塑模制，吹塑瓶(壳体)可以具有圆柱形(圆筒形)形状。内层预制件16和外层预制件17可以通过注射吹塑模制分开地模制并之后再叠置。同时注射吹塑模制可以减少步骤数量，并且可以形成具有高容积效率的吹塑瓶。
考虑到可从双层预制件拉伸的尺寸，吹塑瓶(壳体)的高度可以为40mm以上且350mm以下。从类似的观点来看，吹塑瓶的吹塑部分的宽度(最大外径)可以为10mm以上且130mm以下。吹塑瓶的高度是指吹塑瓶在预制件的拉伸方向26上的长度。吹塑瓶的宽度是指吹塑瓶在与预制件的拉伸方向26正交的方向上的长度。
吹塑瓶(壳体)的吹塑部分的厚度可以根据双层预制件15的尺寸和吹塑容器的尺寸确定。特别地，如果双层吹塑瓶包括分离的外层10和内层11，则外层10和内层11各自可具有0.05mm以上且3.00mm以下的厚度。如果通过注射吹塑模制同时模制外层10和内层11，考虑到强度，则外层10可以理想地具有0.30mm以上且2.00mm以下的厚度。类似地，如果通过注射吹塑模制同时模制外层10和内层11，考虑到柔韧性，则内层11可以理想地具有0.05mm以上且0.20mm以下的厚度。
接下来，将描述设置在墨盒13的壳体9上的凸缘。图3A是墨盒13的模制壳体9的透视图。图3B是沿图3A的线B-B'截取的壳体9的剖视图。墨盒13的壳体9包括外层凸缘18和内层凸缘20。外层凸缘18形成在外层10上。内层凸缘20形成在内层11上。外层凸缘18和内层凸缘20这两者均设置在外层10和内层11的非吹塑部分24b上。凸缘指的是在与壳体9的高度方向(预制件15的拉伸方向)交叉的方向上突出并延伸的部分。
图4A和4B是墨盒13的壳体9的凸缘18和20(由图2C中的圆圈A包围的区域)的放大视图。如图4A所示，外层凸缘18可以在接触区域36中与内层凸缘20接触。对于注射吹塑，通常形成凸缘以在注射吹塑模制期间固定预制件。在本示例性实施例中模制的墨盒13的情况下，凸缘18和20也可以用作盖构件2的结合凸片(未示出)固定到其上的固定部分，并且用作待焊接至接合构件1的焊接部分。将描述将内层凸缘20焊接至接合构件1的过程。图5A和5B示出了接合构件1。图5B是沿图5A的线J-J'截取的接合构件1的剖视图。接合构件1包括焊接肋34。内层凸缘20包括焊接肋19。焊接肋19和34被加热并彼此接合以完成焊接。在激光焊接的情况下，内层凸缘20可以在不具有焊接肋19的情况下焊接至接合构件1。然而，为了获得均匀的焊接强度，即使在激光焊接的情况下，也可以形成焊接肋19。焊接方法不受特别地限制，只要可以焊接内层凸缘20和接合构件1即可。将描述使用红外焊接的示例。红外焊接可以通过使用掩模而选择性地加热焊接肋19和34，并且因此与热板焊接相比可以降低周围区域中的温度升高。特别地，这种焊接方法可适用于这里描述的墨盒13，因为诸如墨水通道构件8的功能部件布置在焊接肋19和34附近。与热板焊接不同，红外焊接需要吸收红外线。于是材料可以用黑色着色以便短时间焊接。如果焊接肋19和34未焊接在适当的位置处，则由于肋的加热或加压不充分或焊接面积减小，会发生墨水从焊接部分泄漏。
注射吹塑模制是一种通过用拉伸杆纵向地拉伸加热的预制件并且然后用加压空气横向地拉伸并膨胀预制件而模制所需形状的模制方法。如果对具有低耐热性或低结晶度的材料进行注射吹塑模制，则由于应力松弛引起的模制后收缩会发生变形，并且不能获得所需的形状。现在，将描述由于模制后的收缩而会在双层预制件的注射吹塑模制中发生的变形。
图4B示出了图4A的内层凸缘20如何从外层凸缘18剥离并且内层凸缘20如何变形。内层11在注射吹塑后不太可能被热定形，因此会由于模制后的收缩而变形，使得在注射吹塑后内层凸缘20被拉入壳体9中(在图4B中向右)。如果在这种状态下进行上述焊接，则会在不适当的位置处焊接内层凸缘20并导致不牢的焊接或泄漏。
通过使用具有高耐热性和高结晶度的材料，可以抑制模制后的收缩。但是，这种材料不适合作为形成墨盒的内层的材料。而且，与直接吹塑相比，注射吹塑涉及纵向拉伸且因此易于收缩。
在本示例性实施例中，突部形成在内层凸缘20和外层凸缘18中的任一者上，并且凹部形成在另一者中。突部装配至凹部，由此抑制凸缘变形。作为示例将描述图6A中所示的构造。如图6A所示，在外层凸缘18中在内层凸缘20与外层凸缘18之间的接触区域中形成凹部28。内层凸缘20的突部(内层凸缘20位于凹部28内的部分)装配至外层凸缘18的凹部28。如果通过将内层11嵌入模制在具有凹部28的外层凸缘18上而模制预制件15，则内层凸缘20模制成具有装填凹部28的突出形状。凹部28的设置可以抑制内层凸缘20的变形，因为凹部28起到抵抗内层凸缘20的前述运动的壁的作用。在具有凹部28的外层凸缘18上嵌入模制内层11也增强了内层凸缘20与外层凸缘18之间的粘附性(摩擦系数)，因此可以进一步抑制变形。
在注射吹塑中，通常在由夹具固定预制件的凸缘的情况下进行拉伸和吹气。在这种情况下，凸缘需要具有不会在拉伸期间或吹气期间由于应力引起变形的强度。因此，外层凸缘18的厚度(图6A中由W1表示的部分的长度)可以为1.5mm以上。然而，太厚的凸缘会促进出现凹痕(模制制品的表面下沉的现象)或空隙(在模制制品内部出现气泡的现象)。因此，外层凸缘18的厚度可以为5.0mm以下。
接下来，将描述凹部28的深度。如图6A中所示，如果凹部28形成在外层凸缘18中，则外层凸缘18相应地变薄，并且在内层预制件16的模制期间更容易发生短缺。因此凹部28需要有适当的深度。具体地，外层凸缘18在与凹部28相对的位置处的厚度(通过从外层凸缘18的厚度W1减去内层凸缘20的厚度W2和凹部28的深度W3而获得的长度)可以为0.5毫米以上。
图6B示出了在外层凸缘18上形成突部29的构造。突部29装配至内层凸缘20中的凹部。即使在这种情况下，如图6A所示，由于突部29起到了抵抗内层凸缘20由于变形而运动的壁的作用，因此可以抑制内层凸缘20的变形。如果设置突部29，则内层凸缘20倾向于具有较小的厚度，但是内层凸缘20可以形成为具有适当的厚度。具体地，内层凸缘20在与突部29相对的位置处的厚度(通过从内层凸缘20的厚度W2减去突部29的高度W4而获得的长度)可以为0.5mm以上。
如上所述，外层凸缘18可以设置有凹部28或凸起29。为了防止在凸缘中形成薄部，如果通过从外层凸缘18的厚度W1减去内层凸缘20的厚度W2而获得的长度大于内层凸缘20的厚度W2，则可以形成凹部28。如果所述长度小于内层凸缘20的厚度W2，则可以形成凸起29。
由于凹部28和突部29起到了防止内层凸缘20变形的壁的作用，因此凹部28和突部29可以尽可能地与变形方向成直角地形成。具体地，凹部28的内壁和突部29的外壁可以相对于图6A和6B的水平方向(凸缘18和20的延伸方向、或者与预制件15的拉伸方向正交的方向)以80°-100°的角度延伸。凹部28的内壁和突部29的外壁可以具有10°以下的锥角。
下文将通过使用示例更详细地描述本示例性实施例。
将参考图7A至7C描述示例1的构造。图7A示出了墨盒13的壳体9的顶视图和剖视图。图7B是凸缘18和20在C-C'截面中的放大视图。图7C是在凸缘18和20的高度方向(拉伸方向、或图7B中从上到下的方向)上观察的外层凸缘18的视图。
在示例1中，LLDPE用作形成内层11的材料，并且PET用作形成外层10的材料。首先形成包括两层这样层的叠层的双层预制件15。双层预制件15形成为使得作为内层11的内层预制件16具有1.0mm的厚度，并且作为外层10的外层预制件17具有2.8mm的厚度。外层预制件17的高度为90.0mm。
由于凸缘18和20设置在非吹塑部分上，因此无论是在预制件15状态下还是在模制成吹塑瓶后的壳体9状态下，凸缘18和20的尺寸均不改变。将参照图7B中的壳体9的凸缘18和20的放大视图描述预制件15的凸缘18和20的厚度。预制件15的外层凸缘18的厚度W1为2.8mm，内层凸缘20的厚度W2为1.0mm。凹部28形成在外层凸缘18中。凹部28的深度W3为0.8mm。凹部28的宽度W5为1.0mm。内层凸缘20具有尺寸与凹部28的尺寸相同的突部，并且突部装配至凹部28。凹部28和突部沿预制件15的高度方向延伸，并相对于外层凸缘18和内层凸缘20的延伸方向形成90°的角度。如图7C所示，当在凸缘18和20的高度方向上观察时，凹部28形成为具有环形形状。在内层凸缘20上形成宽度(图7B中的水平长度)为2.0mm且高度(图7B中的竖直长度)为1.2mm的焊接肋19。
使用这种双层预制件15，在注射吹塑模制机(FRB-1，由Frontier有限责任公司制造)中进行注射吹塑模制。对于注射吹塑模制，首先转动双层预制件15并通过使用卤素加热器从外部加热双层预制件15。具体地，在距离外层预制件17的表面20mm的位置处以15mm的间距布置六个加热器，并且将预制件15加热50秒。调节卤素加热器的输出值，使得加热处理后外层预制件17的温度被控制在70℃以上且160℃以下。通过用非接触式温度传感器测量刚加热后的双层预制件15的温度(即紧接在注射吹塑之前的外层预制件17的温度)来检查模制温度。
将加热的预制件15插入模具中，然后关闭模具，并且通过拉伸杆轴向地拉伸预制件15的内部。同时，吹入30个大气压的空气以将整个制品模制成瓶形状。以这种方式，形成了墨盒13的作为吹塑瓶的壳体9。在凸缘18和20中/上形成凹部以及装配至其的突部。凹部和突部均沿壳体9的高度方向延伸，并且相对于外层凸缘18和内层凸缘20的延伸方向形成90°的角度。
模制壳体9的直径为57.0mm，高度为200.0mm。吹塑模制后外层10在吹塑部分中的平均厚度(在10个任意分布点处测量)为0.5mm。内层11在吹塑部分中的平均厚度(在10个任意分布点处测量)为0.1mm。
目视观察墨盒13的模制壳体9以检查内层凸缘20的状态。在内层凸缘20中未观察到变形，并且获得了良好的壳体。
将参考图8A至8C描述示例2的构造。图8A示出了墨盒13的壳体9的顶视图和剖视图。图8B是凸缘18和20在D-D'截面中的放大视图。图8C是从凸缘18和20的高度方向(拉伸方向)观察的外层凸缘18的视图。
在示例2中，外层凸缘18中的凹部28布置在相对于壳体9的高度方向(预制件15的拉伸方向)从形成在内层凸缘20上的焊接肋19偏离的位置处(在使得凹部28和焊接肋19的中心即使在壳体9的高度方向上延长也不重叠的位置处)。在其他方面，墨盒13的壳体9以与示例1类似的方式模制。
目视观察墨盒13的模制壳体9以检查内层凸缘20的状态。在内层凸缘20中未观察到变形，并且获得了良好的壳体。与示例1相比，在焊接肋19上观察到更少的凹痕。
将参考图9A至9C描述示例3的构造。图9A示出了墨盒13的壳体9的顶视图和剖视图。图9B是图9A的凸缘18和20在E-E'截面中的放大视图。图9C是从凸缘18和20的高度方向(拉伸方向)观察的外层凸缘18的视图。
在示例3中，突部29而不是凹部28形成在外层凸缘18上。在内层凸缘20中形成突部29装配至其的凹部。在其他方面，墨盒13的壳体9以与示例2类似的方式模制。
目视观察墨盒13的模制壳体9以检查内层凸缘20的状态。在内层凸缘20中未观察到变形，并且获得了良好的壳体。
将参考图10A至10C描述示例4的构造。图10A是墨盒13的壳体9的顶视图和剖视图。图10B是凸缘18和20在F-F'截面中的放大视图。图10C是从凸缘18和20的高度方向(拉伸方向)观察的外层凸缘18的视图。
如图10C所示，在示例4中，当在高度方向上观察外层凸缘18时形成环形形状的凹部28呈部分地分段的形状。在其他方面，墨盒13的壳体9以与示例1类似的方式模制。
目视观察墨盒13的模制壳体9以检查内层凸缘20的状态。在内层凸缘20中未观察到变形，并且获得了良好的壳体。
在示例4中，凹部28的部分分段提供了壁35，用于阻止围绕预制件15的拉伸方向26在旋转方向上的运动。因此也可以限制外层凸缘18在旋转方向的运动。
将参考图11A和11B描述示例5的构造。图11A示出了墨盒13的壳体9的顶视图和剖视图。图11B是在凸缘18和20的高度方向(拉伸方向)上观察的凸缘18和20的视图。如图11B所示，在示例5中，在外壳9(凸缘18和20)的高度方向上观察，在外层凸缘18中在外层凸缘18和内层凸缘20之间的接触区域中形成凹部37，而不是根据示例1的凹部28。内层凸缘20设置有尺寸与凹部37的尺寸相同的突部，并且突部装配至凹部37。即，当在高度方向上观擦壳体9时，凹部37和突部的隆起和凹痕是可见的。凹部37和突部不是形成为环形形状，而是图11B中所示的形状。在其他方面，墨盒13的壳体9以与示例1类似的方式模制。
目视观察墨盒13的模制壳体9以检查内层凸缘20的状态。在内层凸缘20中未观察到变形，并且获得了良好的壳体。
根据示例5的构造，可以形成与壳体9的高度方向(拉伸方向)平行的表面，而不会由于突部或凹部而在高度方向(拉伸方向)上形成高度差。因此可以抑制内层凸缘20的变形。如果在凸缘18和20的高度方向上难以提供足够的厚度，则这种构造是有效的。
将参考图12A至12C描述比较例的构造。图12A示出了墨盒13的壳体9的顶视图和剖视图。图12B是凸缘18和20在G-G'截面中的放大视图。图12C是从凸缘18和20的高度方向(拉伸方向)观察的外层凸缘18的视图。
在比较例中，凹部28或装配至其的突部均未形成。在其他方面，墨盒13的壳体9以与示例1类似的方式模制。
目视观察墨盒13的模制壳体9以检查内层凸缘20的状态。发现内层凸缘20变形并与外层凸缘18分离。
尽管已经参考示例性实施例描述了本公开，但是应该理解，本公开不限于所公开的示例性实施例。所附权利要求的范围应被赋予最广泛的解释，以便涵盖所有这些修改和等同的结构及功能。

Claims (15)

1.一种吹塑瓶(9)，所述吹塑瓶由预制件(15)吹塑模制而成，所述吹塑瓶包括至少两层，所述至少两层包括内层(11)和外层(12)，
其中，内层(11)包括内层凸缘(20)，外层(12)包括外层凸缘(18)，并且
其中，在内层凸缘(20)或外层凸缘(18)中的任一者上形成突部(29)，在另一者中形成凹部(28)，并且突部(29)装配至凹部(28)，使得凹部(28)提供抵抗内层凸缘(20)的运动的壁，
其中，突部(29)形成在内层凸缘(20)上，并且凹部(28)形成在外层凸缘(18)中，其特征在于，
在沿吹塑瓶(9)的高度方向观察时，凹部(28)形成为部分分段的环形形状，
凹部(28)的部分分段能够提供用于阻止围绕预制件(15)的拉伸方向(26)的旋转方向上的运动的壁(35)，并且
外层凸缘(18)在旋转方向上的运动也受到限制。
2.根据权利要求1所述的吹塑瓶，其中，外层凸缘在与突部相对的位置处具有0.5mm以上的厚度。
3.根据权利要求1所述的吹塑瓶，其中，突部形成在外层凸缘上，并且凹部形成在内层凸缘中。
4.根据权利要求3所述的吹塑瓶，其中，内层凸缘在与突部相对的位置处具有0.5mm以上的厚度。
5.根据权利要求1所述的吹塑瓶，其中，外层的刚度高于内层的刚度。
6.根据权利要求1所述的吹塑瓶，其中，内层由聚烯烃树脂、烯烃基热塑性弹性体、和苯乙烯基热塑性弹性体中的至少一种制成。
7.根据权利要求1所述的吹塑瓶，其中，内层由聚乙烯或聚丙烯制成。
8.根据权利要求1所述的吹塑瓶，其中，内层由线性低密度聚乙烯制成。
9.根据权利要求1所述的吹塑瓶，其中，外层由聚酯树脂制成，所述聚酯树脂选自包括聚对苯二甲酸乙二醇酯、聚萘二甲酸乙二醇酯或聚对苯二甲酸丁二醇酯的组。
10.根据权利要求1所述的吹塑瓶，其中，外层由聚对苯二甲酸乙二醇酯制成。
11.根据权利要求1所述的吹塑瓶，其中，凹部的内壁和突部的外壁相对于外层凸缘和内层凸缘的延伸方向以80°-100°的角度延伸。
12.根据权利要求1所述的吹塑瓶，其中，凹部和突部沿着吹塑瓶的高度方向延伸。
13.根据权利要求1所述的吹塑瓶，
其中，焊接肋(19)形成在内层凸缘(20)上，并且
其中，焊接肋和凹部设置在沿着吹塑瓶的高度方向偏移的位置处。
14.根据权利要求1所述的吹塑瓶，其中，凹部和突部形成为使得如果从吹塑瓶的高度方向观察吹塑瓶，凹部和突部的隆起和凹痕是可见的。
15.根据权利要求1所述的吹塑瓶，其中，吹塑瓶是构造成在内侧保持墨水的墨盒。
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