CN1017515B - 内部带压容器的底座构形 - Google Patents

内部带压容器的底座构形

Info

Publication number
CN1017515B
CN1017515B CN88108480A CN88108480A CN1017515B CN 1017515 B CN1017515 B CN 1017515B CN 88108480 A CN88108480 A CN 88108480A CN 88108480 A CN88108480 A CN 88108480A CN 1017515 B CN1017515 B CN 1017515B
Authority
CN
China
Prior art keywords
leg
rib
container
base
base configuration
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CN88108480A
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English (en)
Other versions
CN1034253A (zh
Inventor
苏帕恩·姆·克瑞斯南科马
怀恩·南·科里特
布朗·海·米勒
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Graham Packaging Pet Technologies Inc
Original Assignee
Continental PET Technologies Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=22449584&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CN1017515(B) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Continental PET Technologies Inc filed Critical Continental PET Technologies Inc
Publication of CN1034253A publication Critical patent/CN1034253A/zh
Publication of CN1017515B publication Critical patent/CN1017515B/zh
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • B65D1/0284—Bottom construction having a discontinuous contact surface, e.g. discrete feet

Landscapes

  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

本发明涉及吹塑成型的热塑树脂容器的底座构形。已经发现，在预制件吹塑成型时使相邻腿和脚之间的肋有更大的范围，由于肋有较大宽度，从而成比例地加厚了预制件材料厚度，这样，在底座结构的高应力区提供了较大强度，其结果减少了应力裂纹损坏。

Description

本发明一般涉及吹塑成型的热塑树脂容器的新颖、实用的改进，具体涉及这种容器底座构形。
多少年来，已在生产一些容器，主要是瓶子，它们底座构形以半球形为主，但它带有凸起，形成多个止于脚的腿，在这些腿之间的底座构形部分为肋的形式，这种底座构形的一个严重问题是产生应力裂纹及断裂，应力裂纹是当施加的压力超过临界值时在底座产生的。通过使施加的压力低于临界值，可以消除应力裂纹的产生，从而也可消除断裂的产生，根据本发明，底座构形的改进是通过使肋条横截面加至最大，从而，当施加一个例如内压的力时，在肋条上产生低的应力。
本发明特别涉及热塑性树脂吹塑容器，用于封装碳酸饮料。这种底座构形的基本要求是：能耐受内部压力，能耐受降落冲击，具有竖立的稳定性，具有可吹塑性，并且重量轻。
在有内压情况下，内部负荷的主要部分由肋条承载，为了把最大的应力水平保持在极限内，肋条的断面必须加至最大，并且避免肋条和脚结合处出现尖锐的突然过渡，同时脚的形状和尺寸应该是可吹 塑的。考虑到可允许的总的底表面积，可吹塑的脚的形状及尺寸，所要求的竖立稳定性以及所要求的底座及脚的最低点之间的高度差，作为对比，过去用六个腿六个脚，如果腿的数目减至5个，则肋的截面积可更容易地增加，达到本发明的优点。通过限制所使用的腿的数目，底座构形提供给肋的面积可以增加，肋有更多空间的一个必然结果是，肋的厚度（因此其截面积）对任何构形而言可更容易地增加。
由于内部负载的主要部分由肋承载，可以肯定，如果肋构成得比其邻近的腿侧壁厚的话，底座用最小量的材料，即可满足其所需达到的功能。
这样，根据本发明，提供了一种吹塑成型的热塑树脂容器，其底座构形的底部平面轮廓整体呈圆形，包括5个绕底座径向分布的中空腿，每一腿始于容器本体底的圆周，止于圆形底平面轮廓的径向向内的一个脚，并且，邻近的每一个腿被径向延伸的肋分隔开，其中，每一肋的壁厚大于邻近的腿侧壁的壁厚。
关于本发明的上述的目的及后面将谈到的其他的目的，本发明的性质等，通过参照附图，权利要求书的如下详述，将会更清楚地得到理解。
图1是一个瓶子的立视图，它具有本发明的底座构形。
图2是图1的瓶底座构形的放大底平面视图，但其中使用了六个腿。
图3是图1的瓶底座构形的一个底平面视图，其中仅有五个 腿。
图4是沿图3的4-4线的一个放大局部垂直剖视图，示出通过其中一个腿和一个直径上相对的肋的底座构形。
图5是沿图3的5-5线的一局部放大垂直剖视图，示出其中一个肋的具体构形。
现参照详细的附图，可以看到，图1中是一个惯用型瓶子，其总体以序号10表示，瓶10由热塑树脂（例如PET）制成，且由一个预制品吹塑而成，该预制品包含有一个注射成型的颈口部分12。瓶10有一肩部14，圆柱形本体16，以及一个底座构形18，这种底座构形是本发明讨论的主题。
首先参见示于图2的现有技术中的底座构形，可以看到，图2的底座总体以20表示，具有6个腿和脚的底座构形中的腿和脚的外形为，每一个腿22始于容器本体底的圆周，止于圆形底部平面轮廓的径向向内置位的脚24。每一相邻的腿的外形基本相同，并且被相应的径向延伸的肋26所分隔。一般说来，应力裂缝出现在这些肋或其与腿22相连部分中。
根据本发明，使肋的截面积增大，以使这些区域的应力减至最小。参见图5，可以看到，肋26的厚度Rt明显大于与其相连的腿22的壁厚Rt。肋26的这一厚度增加对底座较大应力区域提供了较高强度。而且，可由图5清楚看出，每一肋26和其相邻的腿22之间的圆角区28，有一增加的厚度。其总效果是，在图3-5中总体标以数 字18的改进的底座构形具有较高的抗应力裂纹能力。
同时还发现，一个腿22和其相应的脚24的合适的构造应该是，要求一个腿所占角范围至少为40°，很明显，如果有6个腿22，则可提供给一个腿22及其相应肋26的角范围为60°，这就限定了肋26的每范围为0°-20°之间。
根据本发明的一个特点，已经发现，如果肋构成得具有较大的角范围，则肋可容易地作成具有较大厚度，并因而具有较大截面积。
由上述，根据本发明的一个实施例，底座构形18的肋26作得比图2所示现有技术有较大的肋宽Rw，如图2、3、5所示。
而且，已经证明，腿22及其相连的脚24的构形可满足底座构形的特定功能要求，因此，图3所示实例中，在维持底座构形18、20中的腿22脚24基本相同的同时，腿的数目减少了一个。这样就提供了较大肋宽Rw，较厚肋壁Rt，从而提供了必需的肋强度，5个腿22是实用的。
我们同时指出，每一腿和相邻肋之间的交线，已如图示是直线和径向的，它也可以是稍弯曲的。
还应指出，从底座构形中心E到一个脚24的远角D的径向距离，大约为中心E到底座构形外圆轮廓C之间距离的0.8倍。
参见图4，可以看到，肋26的纵向剖面为弧形，而在图5中，它们已总体示为扁平形，它们也可以有弧形的横向剖面，以便形成一个半球形的一部分，如果腿22和脚24无特殊要求，上述半球形就是底 座18的自然构形。
尽管这里对仅仅一个最佳实施例的底座构形加以了详示和详述，但一些小的变化可能提出，然而它们不超出本发明权利要求书所限定的本发明实质及范围。

Claims (8)

1、一种吹塑成型的热塑树脂容器，具有一个底座构形，其底部平面轮廓为圆形，有5个沿底座径向分布的中空腿，每一腿终止于圆形底平面轮廓的径向向内置位的一个脚，并且，每一相邻的腿被相应的径向延伸的肋所分隔，其特征在于，每一肋的壁厚大于与之相邻的腿的侧壁厚度。
2、根据权利要求1的容器，其特征在于，在每一腿起始于容器本体底的圆周。
3、根据权利要求1或2的容器，其特征在于，在每一肋和与之相邻的腿之间提供有一圆角区，其厚度大于腿侧壁与邻近部分的厚度。
4、根据权利要求1的容器，其特征在于，所述肋的构形为，基本形成一个半球形的一部分。
5、根据权利要求1的容器，其特征在于，所述每一肋的横截面，基本呈平直形。
6、根据权利要求1的容器，其特征在于，每一腿和与之相邻的肋之间的交线，从底面轮廓看时为稍弯形。
7、根据权利要求1的容器，其特征在于，每一脚具有径向的远角，该远角与底座中心的距离基本为底座构形直径的80%。
8、根据权利要求1的容器，其特征在于，所述每一腿所占角范围至少为40°。
CN88108480A 1987-12-11 1988-12-12 内部带压容器的底座构形 Expired CN1017515B (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/131,467 US4785949A (en) 1987-12-11 1987-12-11 Base configuration for an internally pressurized container
US131.467 1987-12-11

Publications (2)

Publication Number Publication Date
CN1034253A CN1034253A (zh) 1989-07-26
CN1017515B true CN1017515B (zh) 1992-07-22

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ID=22449584

Family Applications (1)

Application Number Title Priority Date Filing Date
CN88108480A Expired CN1017515B (zh) 1987-12-11 1988-12-12 内部带压容器的底座构形

Country Status (13)

Country Link
US (1) US4785949A (zh)
EP (1) EP0319958A1 (zh)
JP (1) JP2599776B2 (zh)
KR (1) KR970010832B1 (zh)
CN (1) CN1017515B (zh)
AR (1) AR244157A1 (zh)
AU (2) AU630595B2 (zh)
BR (1) BR8806520A (zh)
CA (1) CA1295266C (zh)
MX (1) MX170936B (zh)
MY (1) MY100865A (zh)
NZ (1) NZ227274A (zh)
PH (1) PH24840A (zh)

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PH24840A (en) 1990-10-30
AU631516B2 (zh) 1992-11-26
MY100865A (en) 1991-03-15
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US4785949A (en) 1988-11-22
KR890009731A (ko) 1989-08-03
KR970010832B1 (ko) 1997-07-01
AU7914491A (zh) 1991-09-12
AU2675488A (en) 1989-06-15
CN1034253A (zh) 1989-07-26
BR8806520A (pt) 1989-08-22
CA1295266C (en) 1992-02-04
MX170936B (es) 1993-09-22
JPH01267146A (ja) 1989-10-25
AU7528391A (en) 1991-07-18
AU630595B2 (en) 1992-11-05
AR244157A1 (es) 1993-10-29
JP2599776B2 (ja) 1997-04-16

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