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CN1034253A - 内部带压容器的底座构形 - Google Patents

内部带压容器的底座构形 Download PDF

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Publication number
CN1034253A
CN1034253A CN88108480A CN88108480A CN1034253A CN 1034253 A CN1034253 A CN 1034253A CN 88108480 A CN88108480 A CN 88108480A CN 88108480 A CN88108480 A CN 88108480A CN 1034253 A CN1034253 A CN 1034253A
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Prior art keywords
rib
base configuration
leg
base
pin
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CN88108480A
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English (en)
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CN1017515B (zh
Inventor
苏帕恩·姆克瑞斯南科马
怀思·南·科里特
布朗·海·米勒
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Graham Packaging Pet Technologies Inc
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Continental PET Technologies Inc
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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
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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—Rigid or semi-rigid 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 or 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—Rigid or semi-rigid 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 or 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

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  • 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的、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，这样就施加上低的应力。
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。考虑到总的底表面积，可以实现如下各项;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高度差。作为对比于过去用的六个腿六个脚，已经作到了脚的数目最多限于五个。通过限制所用脚的数目，底座构形的肋条面积可大大增加。而且，还可看到，通过增加肋条宽度，其厚度也自然地增加了。
更具体说，根据本发明，提供了一种底座构形，它包括不同于习惯的六个而是最多为五个的腿和脚，并保持了习惯底座构形的腿和脚的基本相同的形状。这样，每腿所占的总的角范围为72°。其中每一腿的腿部占角范围为40°，而每一肋占有32°的角范围，作为对比，以前的构形中每一肋所占角范围为20°。
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线的一个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的底座以20表示，为圆形轮廓，带有六个凸起腿22，它们均终止于最低脚24。在每一对腿22之间有一肋26，一般说来，在这种肋或它与相应腿22连接处会出现应力裂纹。
已经发现，腿22及其脚24的一种正确合适的设计是，要求每腿有40°左右的角范围。很明显，如果有六个腿22，则要一腿22及其肋26所占的总的角范围为60°，这导致每一肋26占有20°的角范围。
根据本发明，已经发现，如果肋的构成具有大的角范围，则肋会维持一个正比于其角范围的较大厚度，正如图3所清楚示出的，本发明已确定使底座的肋加宽。
另外，已确定，腿22及其脚24的剐慰陕愕鬃剐蔚奶乇鹨螅虼烁荼痉⒚鳎蓖?2及脚24在底座20，18中保持基本相同时，腿的数目至少减少一个，为了提供必要的肋强度，使用了最多为五个的腿，使用更少数目的腿，例如四个也是可行的。然而，已发现使用五个腿可产生很好的稳定性，而用四个脚常常不稳定，特别是当瓶于放于冰箱架上时就会生这样的问题。
对比于常用的六个腿，使用五个腿22产生了意外的好效果。特别参见图3，可以看到，每腿22之间的间隔有一个总的角范围A，当用五个腿时，A为72°。再有，腿部本身的角范围B仅为40°左右，这样，留给肋26一个32°大小的角范围。
参见图5可以知道，当肋26的宽度RW越大，则其厚度Rt越大。另外，可以看到，肋26的材料厚度Rt大于与其配合的腿22的厚度Lt。肋26的这一厚度的增加使底座较大应力区有较大的强度。而且，由图5所见，在每一肋26和邻近腿22之间的圆角区28，有一增加的厚度。其效果在于，这种改进的底座（如图3～5所示，以号18所代表的）具有较大的应力裂纹抗力。
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 (12)

1、一种内部带压容器的底座构形，其特征在于，该底座构形的轮廓基本呈圆形，最多由五个径向延伸的腿构成，每一腿终止于一个脚，从底座的圆形轮廓径向向内凹进，并且，所述腿被径向延伸的肋分隔开，该底座构形的改进在于，所说腿和脚大致与具六个腿脚底座的肋和腿有相同的轮廓，以及，所述肋的宽度大于具六个腿、脚底座的肋的宽度。
2、根据权利要求1的底座构形，其特征在于，每一肋的壁厚正比于肋的宽度。
3、根据权利要求1的底座构形，其特征在于，每一肋的壁厚正比于肋的宽度，肋越宽则壁越厚。
4、根据权利要求1的底座构形，其特征在于，每一肋所占的角范围为30°左右或更大。
5、根据权利要求1的底座构形，其特征在于，肋的构形为，大致形成为半球形的一部分。
6、根据权利要求1的底座构形，其特征在于，所述腿的数目为五个，并且，每一腿部所占的角范围大于或等于40°。
7、根据权利要求1的底座构形，其特征在于，所说腿的数目为五个，每个腿腿部所占角范围为40°左右，每一肋所占角范围为32°左右。
8、根据权利要求1的底座构形，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为底座构形直径的80%左右。
9、一种内部带压容器的底座构形，其特征在于，该构形的轮廓基本呈圆形，由五个径向腿构成，每一腿终止于一个脚，从底座的圆形轮廓径向向内凹进，并且，所述腿被径向延伸的肋分隔开，所述底座构形的改进在于，每一肋所占的角范围为30°左右。
10、根据权利要求9的底座构形，其特征在于，所述每一腿腿部占的角范围约为40°，提供给每一肋的角范围为32°左右。
11、根据权利要求9的底座构形，其特征在于，所述肋的构形为，大致形成一个半球形的一部分。
12、根据权利要求9的底座构形，其特征在于，每一脚具有径向的远角，它与底座中心之间的距离约为底座构形直径的80%。
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
US131.467 1987-12-11
US07/131,467 US4785949A (en) 1987-12-11 1987-12-11 Base configuration for an internally pressurized container

Publications (2)

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

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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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KR970010832B1 (ko) 1997-07-01
US4785949A (en) 1988-11-22
NZ227274A (en) 1991-09-25
AU631516B2 (zh) 1992-11-26
PH24840A (en) 1990-10-30
MY100865A (en) 1991-03-15
EP0319958A1 (en) 1989-06-14
JP2599776B2 (ja) 1997-04-16
AU7528391A (en) 1991-07-18
AU7914491A (zh) 1991-09-12
AU630595B2 (en) 1992-11-05
AR244157A1 (es) 1993-10-29
JPH01267146A (ja) 1989-10-25
AU2675488A (en) 1989-06-15
CA1295266C (en) 1992-02-04
BR8806520A (pt) 1989-08-22
CN1017515B (zh) 1992-07-22
MX170936B (es) 1993-09-22
KR890009731A (ko) 1989-08-03

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