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CN101863093B - 一种拉伸、注塑及吹制超轻型瓶子的装置 - Google Patents

一种拉伸、注塑及吹制超轻型瓶子的装置 Download PDF

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CN101863093B
CN101863093B CN200910215357.0A CN200910215357A CN101863093B CN 101863093 B CN101863093 B CN 101863093B CN 200910215357 A CN200910215357 A CN 200910215357A CN 101863093 B CN101863093 B CN 101863093B
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莫仁诺·巴瑞儿
埃琳娜·奥尔多
迪诺·恩里科·赞恩
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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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    • B29B11/00—Making preforms
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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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    • B29C2949/3032—Preforms or parisons made of several components having components being injected
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    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/06—Injection blow-moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
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Abstract

一种新的，代替简单圆筒状的内颈剖面，它靠近一个内环处，位于与支撑凸耳(A)水平的高度上，并与支撑凸耳(B)下面的区域内的一个特殊剖面相对应。这些剖面使得支撑凸耳与其下面的区域之间的内壁材料可以是具有不同形状和结构(转动形状)，使得颈部不会变成椭圆形，并且在吹制过程中既不用减少重量，也可以使支撑凸耳不发生变形。本发明可以获得一种具有良好物理机械性能的超轻型容也可以通过减少颈部的重量来减少总重量。常用的方法是减小颈部的宽度，但是这样会使颈部变成椭圆形，从而引起不密封的问题，使内容物发生损失。现有技术中对颈部宽度的减小还会带来径向更度过小的问题。在此所述的本发明可以提供由不同原材料制成的各种类型的超轻型容器。

Description

一种拉伸、注塑及吹制超轻型瓶子的装置
背景技术
在过去的数年中，人们一直在持续地研究获得超轻型热塑性容器。
在意大利，人们也在研究一种不会降低瓶子物理机械性能的超轻型瓶子/瓶胚体剖面。
后来，超轻型的处理集中在颈部，通过减小尺寸，使用薄壁，厚度小的支撑凸耳等等。一个公知的例子是从PCO 1810改进到PCO 19，最后达到“PCO Corvaglia”。
通过这种方法，在实际上完成了对球形重量的减少。
无论如何，为了经济和环境因素，现在更紧迫，更紧急地需要使用更少的材料。
在某些情况下，也可以使重量非常轻，但是必须加入氮气才能使这些容器具有合适的机械性能。事实上一旦容器被打开，它就变得很难处理。
因此必须要获得那些既具有良好机械性能，并且重量也轻的容器。
对具有最轻的公知颈部的最轻制造瓶进行重量的具体分析后，发现最重要的部分是颈部和支撑凸耳下面的区域。
例如，在某些情况下，该部分聚积了40-26％的材料。
因此一种超轻型颈部，其具有必要的硬度，从而在容器的制造过程中保持其形状，并具有持续阶段的抵抗力，直至消费者的最后使用，这些都不能引起瓶体重量的增加。
通过减小颈部的宽度，可以进一步减少颈部的重量，但是在实际中这会在加热和吹制过程中引起一些问题，如颈部发生变形及/或颈部支撑凸耳发生变形，从而会在后续的装瓶过程中增加难度，如引导运输，填充运 输，包覆运输和码垛运输等。颈部会在这些最后的步骤中损毁。
新的瓶胚体/模具可以减小颈部的宽度，使宽度小于实际的限制，这些实际的限制到目前为止被认为是必须的，它可以防止由主要的表面径向阻力引起的椭圆形变形。
这样在最初的分析中，就产生了一种比现有瓶子的重量小30-40％的瓶子。此外，还额外减轻了瓶子14％的重量。在这些容器中，较之最初的考虑，它的颈部及支撑凸耳下面的区域仅占了17％的材料。
此外，还可以制造出防止颈部发生变形的盖子。本发明在减少盖子重量的同时，保持了盖子的硬度。
颈部剖面及支撑凸耳下面的区域所具有的特殊表面可以增加距离Z，使之更有益于盖子的制造及瓶子的运输。
由于表面积最大化，因此该尺寸也可以最大化，运输也可以最简易。该尺寸的增加也可以有益于盖子的制造，使得心轴可以简易地紧夹支撑凸耳。
当颈部表面是转向型时(图1)，该尺寸(z+z1)比传统设计(图2)约大20-100％。此外还证实了本发明中的部分可用表面(z+z 1)既可以减小支撑凸耳的直径，还可以进一步减少颈部的重量。
虽然颈部的重量减轻了，但是由于可用的主要空间增加了安全性，因此直径z到z+z1的减小将有益于大型结构时典型地应用手柄。
本发明另一个重要方面是其可以适用于现有的生产线，包括吹制机械，运输生产线和灌装机械。本发明也能适用于改进的设计和新系统。
通过用支撑凸耳简单地代替瓶颈，就可以使用现有的各种模具。
发明概述
本发明的目的是制造超轻型颈部和超轻型瓶胚体，它不会在瓶子的吹制、灌装、封盖和运输，包括最后的使用过程中影响颈部及支撑凸耳下面 区域，而一直保持颈部的支撑凸耳及其下面区域的形状和硬度。
由于在支撑凸耳处的材料具有抗性，从而使颈部可以保持其圆环形。
另一个问题是避免了支撑凸耳发生损坏：在整个加热吹制过程中，由于支撑凸耳非常轻，因此它不可能不向上损坏。
为了防止上述情况的发生，瓶颈靠近于支撑凸耳下面的区域，而在支撑凸耳下面区域的瓶子剖面上具有一个带有弯曲部分(B)的凹环，它可以增加一个抵抗力，来遏制支撑凸耳向上的趋势。实际上，当将材料吹附在弯曲上时，可以在支撑凸耳及其下面的区域之间产生一个内环，来防止支撑凸耳发生向上的移动。由于材料性能已经与模具相关连，因此将对这部分上的移动施加力量，来替代将力量转移到支撑凸耳上。
本发明在轴向拉伸过程中使颈部聚积的材料更小，这是因为在实际中瓶子模具中支撑凸耳下面的圆环使瓶胚中支撑凸耳下面的区域与模具具有一定的距离(图1中的f)，这样可以防止塑料发生冷却，能够被推到瓶底，而不会塞住瓶肩，这在图2所示的结构中很容易发生(传统情况)。尤其是比传统情况减小了非伸展区，使所有材料更好地沿着瓶子分布。
图1为瓶胚体剖面的主视图，其中该瓶胚体剖面位于模具内剖面内，而该模具内剖面用于制造瓶子剖面。
图2为传统的情况。
图3的上述凸耳的优选例。图中，
T：螺纹
N.F.：颈部界限
S.R.：密封环
S.L.：支撑凸耳
U.S.L.：支撑凸耳下的区域
P：支撑凸耳平面
图4、5和6是上述剖面具有不同加固件的示意图。
图7和8是具有肋骨的加固件实施例的示意图。
图9是支撑凸耳下面区域的外剖面图。
本发明的目的是为超轻型容器提供一种新的，在颈部水平的瓶胚体内剖面，用于制造具有适宜物理机械特性的超轻型容器。
该目的可以用于颈部及支撑凸耳下面区域高度上的一个瓶胚体剖面与一个瓶子剖面相结合，使该区域更有力，同时能减少瓶体的重量。
本发明可以应用在任意现有的颈部界限，并可以应用所有的热塑性材料中(PET、OPP、PLA等)。

Claims (5)

1.一种用于制造瓶子的装置，所述装置包括瓶胚体和模具，其特征在于
该瓶坯体包括：
颈部界限(N.F.)，其包括支撑凸耳(S.L.)；
支撑凸耳下的区域(U.S.L.)；以及
在所述支撑凸耳下的区域(U.S.L.)下方的瓶坯体主体；
其中，该瓶坯体的内直径有减小，该减小从比所述支撑凸耳(S.L.)的高度高的高度处的颈部向下地开始；
其中，该瓶坯体在所述支撑凸耳下的区域中紧邻所述支撑凸耳形成四分之一环(A)；
其中，所述模具在与所述支撑凸耳下的区域对应的区域中具有凹环，该凹环部分地匹配所述瓶坯体的在所述支撑凸耳下的区域(U.S.L.)中的轮廓；并且
其中，所述瓶坯体在所述支撑凸耳下的区域中的外直径最多比所述颈部的内直径减小0-20％。
2.如权利要求1所述的装置，其特征在于，该四分之一环的内轮廓与所述颈部的内轮廓相连。
3.如权利要求1所述的装置，其特征在于，该四分之一环的内轮廓与所述颈部的内轮廓相切地连接。
4.如权利要求1所述的装置，其特征在于，该四分之一环的内轮廓与所述瓶胚体主体的内轮廓相切地连接。
5.如权利要求1所述的装置，其特征在于，所述支撑凸耳的下表面为平面。
CN200910215357.0A 2008-12-30 2009-12-22 一种拉伸、注塑及吹制超轻型瓶子的装置 Expired - Fee Related CN101863093B (zh)

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