CN1039387A - 带有改进的支撑基座的吹塑瓶 - Google Patents
带有改进的支撑基座的吹塑瓶 Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
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- B65D25/24—External fittings for spacing bases of containers from supporting surfaces, e.g. legs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
- B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
- B65D1/0261—Bottom construction
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Abstract
本发明公开了一种改进的饮料瓶基座,它有一个向上的锥形内壁,其顶点在基座中心,和一个环形的凸形外壁,它包围所述锥形内壁并与锥形内壁和瓶的侧壁汇合。一组加强肋从顶点径向向外延伸并与凸形外壁汇合,将锥形内壁和凸形外壁划分为一组隔开的中空支脚。
Description
本发明是关于装饮料用的塑料瓶,更具体说是关于这种瓶子所用的改进的自带支撑基座,该支撑基座可以增加强度以防止底部在内部碳酸饱和压力作用下变形。
用于碳酸饮料的塑料瓶在使用中的较大困难在于瓶底的强度。由于高达100psi的内部碳酸饱和压力,塑料瓶往往在底部向外凸出,造成所谓的“摇摆”,即当站立时前后摇摆甚至倾倒。此外,由于瓶底向外凸出,瓶的体积就增加,从而降低了灌装标准线,使得顾客认为瓶子未被装足或密封好。
一个方案是提供一个具有半球形底部的瓶子,再装上一个塑料片,作为瓶子的支座。然而这一方案可观地增加了瓶子的重量和成本。业已出现了一些瓶子,它们带有模制在瓶子上的自带支撑基座。制造一个能防止摇摆的自支撑瓶子的方法是增加基座内塑料的数量。塑料的数量要提供足够的强度,结果导致成本增加。
还发展了其它一些瓶子,它们在底部有一些特征以防止摇摆,其中一种这类瓶子在瓶子基底的中心包括一个同轴的凹入圆柱。然而在容积为一升或更小的小瓶子上吹模制出该凹入圆柱是很困难的。
另一种瓶子被称为花瓣状设计。因为在小直径瓶子上吹制出花瓣状支脚是很麻烦的,所以在容积小于1升的瓶子上采用这种设计也很困难。花瓣状设计还需要更多的材料,给瓶子增加了附加的重量。此外,接触点的直径相对较小,限制了瓶子的稳定性。
另一种瓶子设计被称为“supa”瓶。这种瓶在设计上类似于香槟酒瓶,它在瓶子的底部有一个向内的凹入或锥体。“supa”瓶还有数个模制在锥体内表面上的径向向外延伸的加强筋,因此增加了它的强度并防止了锥体部分的摇摆。通过将纵向筋模制在预模制的注射端帽区上而加工出这些筋。在吹模过程中,这些筋减少了瓶子基座上材料的数量。结果基座的壁厚比没有加强筋的瓶子大。由于筋的延展必须被精确控制,所以,吹模制造“spua”瓶更为困难。此外,对于“supa”瓶,接触区域的壁厚也很难控制。当瓶内加压时,壁厚较薄的接触区域比壁厚的区域更易蠕变,这将导致瓶子不能垂直地站立。
所以,本发明的一个目的是提供一个小容积的塑料瓶,其中加工尺寸所受的限制较“supa”瓶小。
本发明的另一目的是减少瓶子的重量,使热塑材料在瓶子上更均匀地分布。
本发明还有一个目的是提供一个具有更好垂直性的瓶子。
本发明还有一个目的是提供一个具有更好稳定性的塑子。
本发明的优点是可以减少瓶子重量,从而节省所用的材料。
本发明另一个优点是均匀分布的材料可以增加瓶子的稳定性,并延长瓶内碳酸饮料的保存期性。
本发明提供了一个吹塑瓶,其独一无二的基座结构易于加工并比现有瓶子使用更少的材料,从而减少瓶子的重量和成本。根据本发明的瓶,包括在其下部的一个支撑基座,基座有一个向上凸起的锥形内壁,其顶点在基座中心,还包括一个环形的凸形外壁,它围绕锥形内壁并在一个圆弧处与内壁汇合,而在瓶子的最底端形成一个支面。凸形外壁还与瓶子侧壁的下端汇合。
在圆弧和锥形内壁的结合处有一个尖锐向内的角,它附加地给瓶子的支面增加了强度。从锥形内壁的顶点径向向外延伸的是三条肋,它们与凸形外壁汇合。这些肋将凹形内壁和凸形外壁划分为三个隔开的中空支脚,并给基座部分提供附加的强度。
结合附图,从下面的描述和权利要求中可以更清楚地了解本发明的其它目的,特征和优点。
图1是一主视图,示出了带有本发明的支撑基座的饮料瓶。
图2是图1所示饮料瓶的底视图,详细示出了支撑基座。
图3是沿图2中3-3线所取的支撑基座的放大断面图。
图4是沿图2中4-4线所取的支撑基座的放大断面图。
图5是沿图2中5-5线所取的支撑基座的放大断面图。
图6是本发明的支撑基座的另一实施例的底视图。
图7是沿图6中7-7线所取的支撑基座的放大断面图。
图8是沿图6中8-8线所取的支撑基座的放大断面图。
现在参照附图,图1示出了一个瓶10,它带有一个根据本发明的改进支撑基座12。该瓶包括一个通常为圆柱形的侧壁22,该侧壁的底部带有支撑基座12。
从图2-图5中可以更容易地看出基座12的详细构成。支撑基座包括一个向上延伸的锥形内壁部分24,其顶点26在基座12的中心,还包括一个环形的凸形外壁28,它环绕内壁24并在瓶的最底端与其汇合,并与圆柱形侧壁22的下端汇合。锥形内壁24的顶点26如图所示是凸形的。顶点26也可为任何所希望的形状,如凹形的或平面形的。
从顶点26径向向外延伸的是三个凸形肋32,它们与凸形外壁28汇合。之所以将肋32描述为“凸形的”是因为当从下面看基座12时(图2),沿长度方向延伸的肋32的表面与平面或凹面对比是凸形的(图3)。这些凸形肋将在顶点26下方延伸的锥形内壁24和凸形外壁28划分为三个在顶点26下方延伸的间隔开的中空支脚36。肋32给支撑基座提供了强度支持以防止因内部碳酸饱和压力的结果造成的锥形内壁24的展平。在支撑基座上可以模制出任何数量的凸形肋32。如果在不平的表面上竖直摆放瓶子而不会倾倒的话,三个凸形肋是最佳的。然而,吹塑制造一个带有三个以上凸形肋的小瓶子是困难的。
在锥形内壁24和凸形外壁28的汇合处是一个圆弧30,它在瓶子的最低点限定了一个支面31。锥形内壁24和支面31是相对倾斜的,从而在锥形内壁24和支面31的连接处形成一个向内的角38。该角38加强了支面31的强度。
为了进一步增加瓶子支撑基座的强度,在每个凸形肋32的中间模制出一个向上凸起或U形肋34。肋34从顶点26向外径向延伸直到与凸形外壁28汇合。当肋34径向向外延伸时其宽度增加。图4和5示出了从顶点26径向向外延伸的肋32和34的形状。
由于分隔出支脚36的凸形肋32,支面31是周向相互隔开的。通过改变凸形肋32的宽度可以改变该间距。如图所示,支面31之间周向隔开的隔开间距大致等于各个支面31的周向长度。
凸形的肋结构允许支脚36比以前的瓶子如花瓣状的瓶径向隔开的更远。径向隔开的支脚使得瓶子较花瓣状的瓶有更大的稳定性。
由于支脚被分隔开,支脚的壁厚更易控制。当加压时,基座上的蠕变更均匀,这样,生产出的瓶子有更好的垂直度。
图6-图8示出了另一实施例,在这一实施例中,相对于前述实施例改变了将锥形内壁和凸形外壁分为隔开的支脚的肋结构。该瓶包括一个圆柱形的侧壁122,侧壁122带有一个从其下端延伸的支撑基座122。支撑基座122包括一个向上指向的锥形内壁124,锥形内壁124在支撑基座的中心有一个顶点126。该顶点可以为任何所需的形状,不一定为图中所示的凸形。一个环形的凸形外壁128环绕内壁124,并在瓶子的最底端与内壁124汇合,并与圆柱形侧壁122的底边汇合。与前述实施例一样,在内壁124与外壁128的交汇处模制了一个圆弧130,从而限定了一个支面131。在圆弧130与锥形内壁124之间形成了一个角138。在这一方案中,用三个通常为水平的肋140代替了凸形肋,水平肋140从顶点126径向向外延伸并与凸形外壁128汇合。肋140将内壁124和外壁128划分为三个隔开的支脚136。肋140也局部地包围了支脚136的外侧。肋140与外壁128的交汇处有一很小的曲率半径以增加基底112的强度。换句话说,平的水平肋140与通常为圆柱形的外壁128尖锐相交,从而加强基底122以抵抗不希望的变形。
制造这些瓶子的最佳材料是聚对苯二甲酸乙酯(DET),然而,也可以使用广泛的热塑材料,如高性能的聚酯,PVC,尼龙和聚丙烯。利用传统的二级预热延展吹模工艺即可模制这些瓶子。由于一级工艺不能提供最佳的延展率而导致在用于碳酸饮料时瓶子不稳,故二级工艺优于一级工艺。
在吹塑期间,预成形的塑料首先与顶点和肋结构接触,然后延展成支脚和支面。作为首先与顶点和肋接触的结果。在这一区域的塑料首先冷却,降低了这一区域的延展。该冷却的结果是在顶点和肋有更大的壁厚,从而产生更大的强度以防不稳。塑料从顶点到支面的延展使得塑料能在支面模制出一个小圆弧。
通过略微改变支脚,凸形外壁和锥形内壁的曲率,即可改变支撑基座的结构。水平肋对每个支脚的包围可以增长以增加支脚区域的支撑。包围特征以及水平肋与凸形外壁的尖锐相交形成一种加强筋效果,增加了瓶子的强度以抵抗由于碳酸压力造成的不稳定性。
应当知道本发明并不限定在以上描述的范围内,但各种改变和改型都不超出由权利要求书限定的范围。
Claims (7)
1、一种塑料瓶,带有一个由圆柱形侧壁构成的中空的瓶体和一个与所述侧壁交汇的基座结构,所述基座结构包括:
一个有上端和下端的向上的凹形内壁,它在上端有一个顶点,所述顶点大致在所述基座结构的中心;
一个环形的凸形外壁,它包围所述内壁并有上端和下端,所述外壁在外壁的下端与所述内壁的下端汇合,并在所述外壁的上端与所述侧壁的下端汇合;
在所述基座结构上的一组向上伸出的肋,它们从所述顶点径向向外延伸到所述外壁,在肋的大致整个长度上每个肋都平滑地延伸,所述肋与所述基座结构的内壁和外壁相交,从而将所述内壁和外壁划分为一组周向隔开的位于肋下方的中空支脚,在肋的径向外端部所述肋与所述外壁汇合。
在最低点形成支面的支脚,用来与支撑面接触,在从通过所述中空支脚的垂直断面看上去时所述支面与所述凹形内壁是相对倾斜的,从而形成指向瓶内的角来加强所述支脚和抵抗所述基座结构的变形。
2、根据权利要求1所述的瓶,其中所述一组肋在数量上是三个。
3、根据权利要求1所述的瓶,其中所述支脚是由在所述凸形外壁和所述内壁交汇处的圆弧形成的,如通过所述中空支脚的垂直断面所示。
4、根据权利要求1所述的瓶,其中沿所述基座结构径向向外的方向上,肋的宽度增加。
5、根据权利要求1所述的瓶,还进一步包括成形在所述肋并从所述肋上向上升起的中空加强凸起。
6、根据权利要求5所述的瓶,其中所述向上凸起大致呈倒U形。
7、根据权利要求5所述的瓶,其中沿所述肋结构径向向外的方向上,所述向上凸起的宽度逐渐增加。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US07/219,732 US4867323A (en) | 1988-07-15 | 1988-07-15 | Blow molded bottle with improved self supporting base |
US219,732 | 1988-07-15 |
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CN1039387A true CN1039387A (zh) | 1990-02-07 |
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CN89104814A Pending CN1039387A (zh) | 1988-07-15 | 1989-07-15 | 带有改进的支撑基座的吹塑瓶 |
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US (2) | US4867323A (zh) |
EP (1) | EP0350782A3 (zh) |
JP (1) | JPH03148440A (zh) |
KR (1) | KR900001578A (zh) |
CN (1) | CN1039387A (zh) |
AR (1) | AR244618A1 (zh) |
BR (1) | BR8903561A (zh) |
CA (1) | CA1330653C (zh) |
DD (1) | DD283978A5 (zh) |
DK (1) | DK350889A (zh) |
FI (1) | FI893424A (zh) |
HU (1) | HUT54086A (zh) |
IL (1) | IL90873A0 (zh) |
JO (1) | JO1591B1 (zh) |
MA (1) | MA21598A1 (zh) |
MX (1) | MX173553B (zh) |
NO (1) | NO892904L (zh) |
NZ (1) | NZ229799A (zh) |
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-
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- 1989-06-29 CA CA000604402A patent/CA1330653C/en not_active Expired - Fee Related
- 1989-07-03 ZA ZA895053A patent/ZA895053B/xx unknown
- 1989-07-03 NZ NZ229799A patent/NZ229799A/xx unknown
- 1989-07-05 IL IL90873A patent/IL90873A0/xx unknown
- 1989-07-06 EP EP19890112318 patent/EP0350782A3/en not_active Withdrawn
- 1989-07-11 AR AR89314359A patent/AR244618A1/es active
- 1989-07-11 MA MA21848A patent/MA21598A1/fr unknown
- 1989-07-13 JP JP1181634A patent/JPH03148440A/ja active Pending
- 1989-07-13 MX MX016794A patent/MX173553B/es unknown
- 1989-07-13 BR BR898903561A patent/BR8903561A/pt unknown
- 1989-07-14 DD DD89330827A patent/DD283978A5/de unknown
- 1989-07-14 KR KR1019890010053A patent/KR900001578A/ko not_active Application Discontinuation
- 1989-07-14 HU HU893580A patent/HUT54086A/hu unknown
- 1989-07-14 PT PT91178A patent/PT91178A/pt not_active Application Discontinuation
- 1989-07-14 FI FI893424A patent/FI893424A/fi not_active Application Discontinuation
- 1989-07-14 DK DK350889A patent/DK350889A/da not_active Application Discontinuation
- 1989-07-14 NO NO89892904A patent/NO892904L/no unknown
- 1989-07-15 CN CN89104814A patent/CN1039387A/zh active Pending
- 1989-07-15 YU YU01422/89A patent/YU142289A/xx unknown
- 1989-07-17 JO JO19891591A patent/JO1591B1/en active
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1991
- 1991-09-17 US US07/761,405 patent/USRE35140E/en not_active Expired - Lifetime
Cited By (8)
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CN101454214B (zh) * | 2006-06-01 | 2013-02-13 | 艾萨帕克控股公司 | 包装的塑料底部 |
CN103269953A (zh) * | 2010-11-25 | 2013-08-28 | 西德尔合作公司 | 组合花瓣形容器基底 |
CN103269953B (zh) * | 2010-11-25 | 2015-11-25 | 西德尔合作公司 | 组合花瓣形容器基底 |
CN103547512A (zh) * | 2011-04-12 | 2014-01-29 | 西德尔合作公司 | 双谷带花瓣形容器基底 |
CN103547512B (zh) * | 2011-04-12 | 2015-11-25 | 西德尔合作公司 | 双谷带花瓣形容器基底 |
CN109715506A (zh) * | 2016-09-06 | 2019-05-03 | 东洋制罐株式会社 | 合成树脂制瓶 |
CN109715506B (zh) * | 2016-09-06 | 2023-09-05 | 东洋制罐株式会社 | 合成树脂制瓶 |
US12030707B2 (en) | 2016-09-06 | 2024-07-09 | Toyo Seikan Co., Ltd. | Synthetic resin bottle |
Also Published As
Publication number | Publication date |
---|---|
BR8903561A (pt) | 1990-03-13 |
USRE35140E (en) | 1996-01-09 |
FI893424A (fi) | 1990-01-16 |
DK350889D0 (da) | 1989-07-14 |
DD283978A5 (de) | 1990-10-31 |
CA1330653C (en) | 1994-07-12 |
MX173553B (es) | 1994-03-15 |
EP0350782A3 (en) | 1990-10-31 |
ZA895053B (en) | 1990-05-30 |
KR900001578A (ko) | 1990-02-27 |
EP0350782A2 (en) | 1990-01-17 |
NO892904L (no) | 1990-01-16 |
NO892904D0 (no) | 1989-07-14 |
NZ229799A (en) | 1991-02-26 |
HUT54086A (en) | 1991-01-28 |
AR244618A1 (es) | 1993-11-30 |
PT91178A (pt) | 1990-02-08 |
AU609691B2 (en) | 1991-05-02 |
JPH03148440A (ja) | 1991-06-25 |
IL90873A0 (en) | 1990-02-09 |
US4867323A (en) | 1989-09-19 |
YU142289A (en) | 1991-04-30 |
JO1591B1 (en) | 1989-12-16 |
FI893424A0 (fi) | 1989-07-14 |
AU3794889A (en) | 1990-01-18 |
MA21598A1 (fr) | 1990-04-01 |
DK350889A (da) | 1990-01-16 |
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