CN1017131B - 广口容器 - Google Patents
广口容器Info
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- CN1017131B CN1017131B CN88108377A CN88108377A CN1017131B CN 1017131 B CN1017131 B CN 1017131B CN 88108377 A CN88108377 A CN 88108377A CN 88108377 A CN88108377 A CN 88108377A CN 1017131 B CN1017131 B CN 1017131B
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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
- B65D1/0276—Bottom construction having a continuous contact surface, e.g. Champagne-type bottom
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B11/00—Making preforms
- B29B11/14—Making preforms characterised by structure or composition
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/071—Preforms or parisons characterised by their configuration, e.g. geometry, dimensions or physical properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/4273—Auxiliary operations after the blow-moulding operation not otherwise provided for
- B29C49/4278—Cutting
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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
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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
- B65D79/00—Kinds or details of packages, not otherwise provided for
- B65D79/005—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting
- B65D79/008—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting the deformable part being located in a rigid or semi-rigid container, e.g. in bottles or jars
- B65D79/0081—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting the deformable part being located in a rigid or semi-rigid container, e.g. in bottles or jars in the bottom part thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C2049/023—Combined blow-moulding and manufacture of the preform or the parison using inherent heat of the preform, i.e. 1 step blow moulding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2793/00—Shaping techniques involving a cutting or machining operation
- B29C2793/009—Shaping techniques involving a cutting or machining operation after shaping
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/07—Preforms or parisons characterised by their configuration
- B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/06—Injection blow-moulding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/08—Biaxial stretching during blow-moulding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
- B29L2031/7154—Barrels, drums, tuns, vats
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S428/00—Stock material or miscellaneous articles
- Y10S428/91—Product with molecular orientation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
- Y10T428/1397—Single layer [continuous layer]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
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- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
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- Physics & Mathematics (AREA)
- Geometry (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Closures For Containers (AREA)
- Basic Packing Technique (AREA)
Abstract
本发明提供了一种适用在一定压力下包装网球或其它物品的广口容器,它们是由聚对苯二甲酸乙二醇酯注模预制件经拉伸吹模成型的,它具有一个改进了的底部结构和凸缘结构。新的底部结构可以承受内压,将变形控制在最小的程度上;而敞口周围改变的凸缘则是由中间体上独特的台阶状调整部分形成的,从而使凸缘有足够的强度和厚度,承受经双层卷边盖于其上的金属端盖。
Description
本发明是关于一种广口容器和由聚对苯二甲酸乙二醇酯(Polye-thylene terephthalate即PET)注模预制体拉伸吹模形成的中间体的,该容器适于在一定压力下包装网球或其它物品。其改进了敞口周围凸缘结构,该凸缘由中间体上独特的调整部分形成,它具有足够的强度和厚度,使金属端盖可以用双层卷边接合在其上。
如美国专利3,733,309所公开的,在生产压力包装容器时,用吹模法产生的分子较好的双轴排列,可以使PET的许多材料性能得到改善。在实际过程中,注模预制件的设计是:将预制件放在其体积与所需中间体相同的模具腔内,在模具内沿纵向拉伸预制件,然后用高压气体将预制件横向吹胀到中间体和模具腔的形状,这样分子在容器的两个方向上都重新排列。
现有的PET分子双轴排列的容器设计常用不承压的底部尤其是在盛汽水饮料的容器中,以使其强度和刚度足以承受纵向压力。独立的抗压底的形式可分为petaloid型(美国专利3,598,270)和Champagne型(美国专利4,465,199),但这两种底在PET拉伸吹模中很难形成,因为它们需要较高的吹模压力和/或二次模的移动,才能使PET材料拉伸和吹胀到与所需的确定的环形空间。
同样,在广口的PET拉伸吹模容器中,还需要其凸缘处分子有
较好的双轴排列,使其在敞口的周围径向向外处有足够的强度和厚度,便于以双层卷边接缝方式,在一定压力下用金属端盖把放有如网球等物品的PET拉伸吹模容器封住。在美国专利4,496,064和4,567,843中公开了带凸缘的PET拉伸吹模广口容器。它需要整个容器均具有分子的双轴排列,以满足性能要求。其中所述中间体的形成是采用了一个截锥型的调整面,包括在筒形部分敞口周围的凸缘,从顶部的缩口处到调整部分底部的凸缘处的分子的双轴排列程度逐渐增加,然后通过凸缘将调整部分切掉,使容器的凸缘敞口处具有分子双轴排列,然而,截锥形的调整部分很难对分子双轴排列的程度和凸缘材料的厚度进行稳定的控制,从而无法保证凸缘的强度和厚度足以使金属端盖双层卷边接合在其上。
因此,本发明的目的是克服现有的PET拉伸模广口容器中所存在的上述问题,提供一种适于在一定压力下包装网球或其它物品的广口容器和中间体,它们是由PET注模预制件经拉伸吹模后得到的。本发明对底部的结构进行了改进,使其可以承受内部压力,并使其变形量最小;同时对敞口周围凸缘的强度和厚度进行了改进,使其足以承受以双层卷边接合在其上的金属端盖。后者是通过中间体独特的调整部分形成的。
根据本发明,上述发明目的可以由提供一种中间体和用该中间体制造的广口容器来完成,其中中间体是由PET注模预制件经拉伸吹模成型的。
容器和中间体包括一个分子双轴排列程度较高的筒形部分和一个分子双轴排列程度较低的底部。底部从筒形部分的下端延伸出来,并
在其中含有可使构成的容器不承压和控制内压所产生变形的结构。
底部最好是包括“Champagne”型的,它含有其一端从筒形部分下端延伸出来的、其形状是半径为预定值的球截面的外周壁;一个其一端从外周壁的另一端延伸出来的承压环,它是一个半径为定值的环状弓形;一个其一端从承压环另一端延伸出来,其形状为截头正锥体的内承压壁;和一个基本上为非分子双轴排列的中心拱底,它是从内承压壁的另一端伸出的、半径为定值的球面弓形。
在这种底部结构中,中心拱底和内承压壁间的连接处、外周壁和承压环间的连接处,有第一和第二节点,这二个节点是中心拱底受到向下的压力在底部所产生的应力集中处。由于第一节点的向外、向下运动和第二节点的向外运动,底部产生的变形最小,使容器的体积和底部的不承压性不发生明显变化。
在广口容器筒形部分敞口周围沿径向向外有改进的凸缘,它具有较高的分子双轴排列程度,且其强度和厚度足以承受一个端盖,特别是双层卷边接合上的金属端盖。这是通过在中间体中经拉伸吹模得到一个独特的调整部分来实现的,该调整部分是从筒形部分的上部延伸出来的(其结构在后面说明)。分子双轴排列的凸缘从筒形部分上端径向向外伸出,在从中间体生产广口容器过程中将其余的调整部分沿环状切掉。分子双轴排列程度逐渐减少的台阶部分沿凸缘的周围向上向内延伸,其间至少包括了向上、向内两个连续的台阶面,以便集中吹模时PET的量、增加分子双轴排列和控制凸缘的厚度。
现结合下面的附图,详细说明在概述中已提出的本发明的目的和优点,及在最佳实施例中说明的其它目的和优点。
图1是具有本发明结构的容器的立体图,容器中包括在一定压力下包装的网球、盖在其上双层卷边接合的金属端盖和(图中从上拿开的)保护罩。
图2是构成图1容器的中间体的立体图,它是由拉伸吹模装置制造的。
图3是注模预制件的纵向剖视图。该注模预制件是用来拉伸吹模成图2所示中间体的。
图4是一个典型的拉伸吹模装置的纵向剖视图,模中装有得到图2的拉伸吹模中间体之前的图3所示之预制件。
图5是图2所示中间体的纵向半剖视图。
图6是图1所示容器的顶部立体图,图中不包括金属端盖,且切掉了图2和3所示中间体中的调整部分。
图7是图1、2和5所示容器和中间体底部的纵向剖视图。其上详细标明了各弓形面的半径、尺寸和角度。
图8是图7所示底部的部分放大剖视图。
图9是图7所示底部的部分剖视图,用来说明底部不同弓形部分的厚度。
图10是底部一侧的局部剖视图,图中表明了为使在一定压力下底部变形最小所具有的节点简图。
图11是与图10相似的视图,它表明了在发生很小的变形时,底部的部分剖视图。
现参照附图详细说明本发明的实施例。图1中的容器10是由图2中的中间体12构成的。中间体12由聚对苯二甲酸乙二酯
(PET)注模预制件13(见图3)拉伸吹模成形。在本实施例及其附图中,容器10是一个广口容器,它适于在一定压力下包装网球(见图1),即用金属端盖14盖住容器10的敞口,端盖14上有保护罩15。本发明的容器10和中间体12的特征在于其改进了底部16的结构,使其能够承受容器内的压力,将变形控制在最小的程度上,以及改进了敞口周围凸缘17的结构(见图6),使它具有足够的强度和厚度,让金属端盖14可以依传统的双层卷边装在其上。如下详述,该凸缘是由中间体12独特的调整部分18(见图2和5形成的。
虽然,本实施例在此将容器10描述为用于包装网球的广口容器(图1),但本发明容器的独到之处及特征也可以用于在一定压力下包装其它物品的广口容器中。同样,改进的凸缘结构17也可用于具有其它类型的底部结构的广口容器中;改进的底部结构16则也可用于在压力下包装物品的非广口容器中。
如上所述,构成广口容器10的中间体12是由PET注模预制件13拉伸吹模成形的,此为一般技术,在前面提及的美国专利3,733,309中有详细说明:先将注模预制件13放在拉伸吹模装置的模具M中(见图4),然后用机械方法纵向拉伸,用高压空气使其横向吹胀,达到中间体12的形状。模具M空腔的形状是由所需中间体的立体形状确定的。这样,PET材料便呈分子双轴排列,得到了中间体12。但是如下所述,这种分子双轴排列会发生变化,特别是在中间体产品12的顶部的调整部分18及底部16处。拉伸吹模操作是本领域普通技术人员都熟知的,对了解本发明来说无需赘
述。
成形的PET拉伸吹模中间体12(图2和5)包括筒形部分20,在拉伸吹模成形时,筒形部分PET材料的纵向和横向拉伸使其具有很好的双轴分子排列。中间体12还有一个筒形部分20上端向上伸出的调整部分18和一个由其确定的凸缘17。凸缘17也有很好的分子双轴排列,它沿筒形部分20上端敞口处径向向外,是将其余的调整部分18沿环状切掉后得到的。凸缘17与容器10的(图6)筒形部分20连成一体,用于接受端盖14。
调整部分18包括台阶壁,在图5中由a、b、c、d、e表示。在凸缘17周围、向上、向里处,分子的双轴排列程度顺a、b、c、d、e依次降低;其上至少包括了向上、向里的两个台阶a、b、c和c、d、e,台阶壁部分a、b、c、d、e在颈部22处结束。颈部22处分子为非双轴排列,因为它是用来将预制件13固定在拉伸吹模装置的模具M中的(图4)。设计成这种独特的台阶壁调整部分18,是为了在凸缘17的PET材料形成分子的双轴排列并控制凸缘17的厚度。在拉伸吹模时台阶壁a、b、c、d、e可以将一定量的PET集中起来,而且在此时将a、b、c和c、d、e每一阶中多余的PET材料集中起来。这样在c、d、e中所含PET材料量比a、b、c中的多,而分子的双轴排列程度却比后者低。这种独特的台阶壁有两个明显的优点:即由于台阶处的分子双轴排列程度不同,从而使凸缘17有较高的分子双轴排列;以及使凸缘17的厚度均匀。上述这两点特征,提高了用双层卷边接缝,将金属端盖安装在凸缘17上的能力。
相反,现有的由PET注模预制件拉伸吹模形成的中间体制造的容器中,其调整部分采用的是有一定斜度的锥角(参见美国专利4,496,064和4,576,843),锥形壁在沿b到c到e的横截面上产生线性膨胀(见图5虚线所示部分),并使调整部分处分子的双轴排列程度从顶处的颈部到其下的凸缘逐渐增加。通过凸缘的分子双轴排列程度的变化,及凸缘厚度的变化使凸缘的强度和厚度无法满足将金属端盖双层卷边接缝的要求。
容器10和中间体12均有一个改进的分子双轴排列程度较低的底部16。该底部是沿筒形部分20的下端伸出的。它包括不受容器10作用和控制内部压力产生变形的结构(在后详述)。底16最好为“Champagne”型的,它包括:其一端从筒形部分20下部延伸出来的、半径为R1的球截面的外周壁25(见图7);一个其一端从外周壁25的另一端延伸出来,半径为R2的环状弓面的承压环26(见图8),承压环不受容器10的作用;底部16还有一个其一端从承压环26一端延伸出来、形状为截头正锥形的内承压环27;最后底部16还有一个分子呈非双轴排列的中心拱底28,该底从内承压壁27的另一端伸出,是半径为R3的球截面,它将底部16的底端封闭。
上述底部16的设计,在力学上是这样考虑的:在中心拱底28和内承压壁27的连接处及外周壁25和承压环26间的连接处构成第一和第二节点(在图10和11中),分别由P1和P2表示,由于作用在中心拱底28向下的内部压力,在底16的节点处便产生了应力集中,第一节点P1的向外、向下运动和第二节点P2的向外运动
(如图10箭头所示),使底部产生一定的变形,即从图10中所示的位置变形到图11所示的位置,而不使容器10的体积或容器10的底部16不承压性发生明显变化。节点P1和P2使底部发生弯曲变化,而且由于底部16的变形使P1和P2间的连接臂与其垂线间的夹角增加,并使外周壁25的复合半径不再是个定值了(如图11所示)。承压环26的作用是不改变底部16的不承压性,这从图10和11的比较中便可清楚看出。
为使其变形最小,构成底部16的尺寸关系最好如下:底部16的最大直径D2大于筒形部分20的直径D3;外周壁25的半径R1与中心拱底28的半径R3相同;承压环26的半径R2为外周壁25的半径R1和中心拱底28半径R3的百分之四至六。
外周壁25、承压环26、内承压壁27和中心拱底28面积之和最好等于与外周壁25的半径R1或中心拱底的半径R3相当的半球的面积,底部16的最大直径D2与承压环26的内侧直径D1之比最好在1.5至1.7之间。调整内承压壁27的高度H1最好使上述的面积要求得到满足,且等于中心拱底28的高度H2。内承压壁27与容器10轴线间的夹角φ最好在7至10间。
如上所述,中心拱底28基本上不具有分子的双轴排列,因此,其厚度大于弓形部分25、26、27的厚度。在图9中也可看出,外周壁25、承压环26、内承压壁27和中心拱底28的厚度是渐渐增加的,中心拱底28、内承压壁27和承压环26的重量占容器10总重的15%至20%。
由此,本发明提供的广口容器10和由PET注模件拉伸吹模形
成的中间体12适于在一定压力下包装网球或其它物品,其特征是对底部16的结构进行了改进,使其可以承受内部压力,并将变形控制在最小的程度,本发明的特征还包括改进了的敞口周围的凸缘结构17,它是由中间体12上一个台阶状的调整部分18形成的,凸缘的强度和厚度足以使金属端盖经双层卷边盖在其上。
在上述附图和说明对本发明最佳实施例的描述中虽然使用了一些专用名词,但它们只是一般的、描述性的,并没有特别的限制。本发明的保护范围由权利要求限定。
Claims (13)
1、一种由聚对苯二甲酸乙二醇酯注模预制件经拉伸吹模成型的中间体制造的,适于在一定压力下包装物品的容器,其特征在于底部的结构可以承受内部压力,并将变形控制在最小的程度上,该容器有一个顶部,一个具有分子双轴排列程度较高的筒形部分和一个分子双轴排列程度较低的“Champagne”型的底部,该底部是从筒形下部伸出的,且其构成使容器不承压,内部压力产生的变形最小;所述“Champagne”型底部包括一个其一端从筒形部分下部延伸出来的,具有一定半径的球截面形的外周壁,一个其一端从外周壁的另一端延伸出来,具有一定半径的环状弓形的承压环,一个其一端从承压环的一端延伸出来,形状为截头正锥体的内承压壁;以及一个基本上不具分子双轴排列的,从内承压壁另一端延伸出来的,形状为半径是预定值的球截面的中心拱底。
2、如权利要求1所述的容器,其特征在于还包括一个在筒形部分敞口端周围并沿径向向外延伸出来的凸缘,该凸缘有很好的分子双轴排列,其厚度和强度足以用双层卷边盖上一金属端盖,以便在一定压力下包装网球或其它物品。
3、如权利要求1或2所述的容器,其中中心拱底和内承压壁的连接处及外周壁和承压环的连接处,有第一、第二节点,该节点位于内压向下作用于底部在其上所产生的应力集中处,第一节点的向外、向下运动和第二节点的向外运动,可以控制底部的变形,使容器的体积或底部的非承压性不发生明显变化。
4、如权利要求1或2所述的容器,其中底部的最大直径大于所述筒形部分的直径。
5、如权利要求1或2所述的容器,其中底部外周壁半径与底部中心拱底的半径大致相等。
6、如权利要求5所述的容器,其中底部承压环的半径为底部外周壁和中心拱底半径的4%至6%。
7、如权利要求1或2所述的容器,其中底部外周壁的直径大于筒形部分的直径,底部外周壁的半径与底部中心拱底的半径大致相等,底部承压环的半径为底部外周壁和中心拱底半径的4%至6%。
8、如权利要求1或2所述的容器,其中底部外周壁、承压环、内承压壁和中心拱底的面积之和基本上等于外周壁半径所相应的半球面的面积。
9、如权利要求1或2所述的容器,其中底部最大直径与底部承压环内侧直径之比介于1.5到1.7之间。
10、如权利要求1或2所述的容器,其中底部内承压壁的高度和中心拱底的高度大致相等。
11、如权利要求1或2所述的容器,其中底部内承压壁与该容器的纵轴呈7至10度的夹角。
12、如权利要求1或2所述的容器,其中底部的厚度顺外周壁、承压环、承压壁到中心拱底依次增加。
13、如权利要求1或2所述的容器,其中中心拱底和内承压壁的连接处、及外周壁和承压环间的连接处包括第一、第二节点,该节点位于由内压向下作用的中心拱底在其上所产生的应力集中处,由于第一节点的向外、向下运动和第二节点的向外运动,可以控制底部的变形,不致使容器的体积或底部的非承压性发生明显变化,底部外周壁的直径大于筒形部分的直径,底部外周壁的半径与底部中心拱底的半径大致相等,底部承压环的半径为底部外周壁和中心拱底半径的4%至6%,底部外周壁、承压环、内承压壁和中心拱底的面积之和基本上等于外周壁半径相应的半球面的面积,底部的最大直径与底部承压环内侧直径之比在1.5至1.7之间,底部内承压壁的高和中心拱底的高大致相等,底部的内承压壁与通过容器的纵轴间呈7至10度夹角,底部的厚度从外周壁、承压环、内承压壁到中心拱底逐渐增厚。
Priority Applications (1)
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CN 91111845 CN1022748C (zh) | 1987-12-07 | 1988-12-07 | 广口容器的中间体 |
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Application Number | Priority Date | Filing Date | Title |
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US07/129,706 US4894268A (en) | 1987-12-07 | 1987-12-07 | Stretch blow-molded polyethylene terephthalate wide mouth container and intermediate article |
US129706 | 1987-12-07 |
Related Child Applications (1)
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CN 91111845 Division CN1022748C (zh) | 1987-12-07 | 1988-12-07 | 广口容器的中间体 |
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US (1) | US4894268A (zh) |
EP (2) | EP0523749A1 (zh) |
JP (1) | JPH0622859B2 (zh) |
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CN (1) | CN1017131B (zh) |
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BR (1) | BR8806439A (zh) |
CA (1) | CA1314826C (zh) |
DE (2) | DE3889206T2 (zh) |
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IN (1) | IN171136B (zh) |
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1987
- 1987-12-07 US US07/129,706 patent/US4894268A/en not_active Expired - Fee Related
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1988
- 1988-11-23 CA CA000583935A patent/CA1314826C/en not_active Expired - Fee Related
- 1988-11-25 DE DE3889206T patent/DE3889206T2/de not_active Expired - Fee Related
- 1988-11-25 IN IN972/CAL/88A patent/IN171136B/en unknown
- 1988-11-25 EP EP92115228A patent/EP0523749A1/en not_active Withdrawn
- 1988-11-25 AT AT8888311164T patent/ATE104628T1/de not_active IP Right Cessation
- 1988-11-25 DE DE198888311164T patent/DE320151T1/de active Pending
- 1988-11-25 EP EP88311164A patent/EP0320151B1/en not_active Expired - Lifetime
- 1988-11-25 ES ES88311164T patent/ES2010160T3/es not_active Expired - Lifetime
- 1988-11-28 ZA ZA888901A patent/ZA888901B/xx unknown
- 1988-12-06 JP JP30705588A patent/JPH0622859B2/ja not_active Expired - Lifetime
- 1988-12-06 AU AU26588/88A patent/AU606557B2/en not_active Ceased
- 1988-12-07 BR BR888806439A patent/BR8806439A/pt not_active IP Right Cessation
- 1988-12-07 CN CN88108377A patent/CN1017131B/zh not_active Expired
- 1988-12-07 KR KR1019880016266A patent/KR950007146B1/ko not_active IP Right Cessation
- 1988-12-07 MX MX014073A patent/MX165668B/es unknown
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1990
- 1990-12-31 GR GR89300170T patent/GR890300170T1/el unknown
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Publication number | Priority date | Publication date | Assignee | Title |
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CN100354105C (zh) * | 2001-07-17 | 2007-12-12 | 株式会社开拓 | 广口容器的双轴拉伸吹塑成形方法以及装置 |
Also Published As
Publication number | Publication date |
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ES2010160A4 (es) | 1989-11-01 |
CN1035080A (zh) | 1989-08-30 |
EP0320151A2 (en) | 1989-06-14 |
EP0320151B1 (en) | 1994-04-20 |
AU606557B2 (en) | 1991-02-07 |
AU2658888A (en) | 1989-06-08 |
DE320151T1 (de) | 1990-02-08 |
ATE104628T1 (de) | 1994-05-15 |
EP0523749A1 (en) | 1993-01-20 |
GR890300170T1 (en) | 1990-12-31 |
CA1314826C (en) | 1993-03-23 |
KR890009730A (ko) | 1989-08-03 |
JPH01221220A (ja) | 1989-09-04 |
EP0320151A3 (en) | 1990-01-17 |
ZA888901B (en) | 1989-08-30 |
IN171136B (zh) | 1992-08-01 |
BR8806439A (pt) | 1989-08-22 |
US4894268A (en) | 1990-01-16 |
MX165668B (es) | 1992-11-27 |
DE3889206D1 (de) | 1994-05-26 |
JPH0622859B2 (ja) | 1994-03-30 |
ES2010160T3 (es) | 1994-07-01 |
KR950007146B1 (ko) | 1995-06-30 |
DE3889206T2 (de) | 1994-09-22 |
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