WO2019200770A1 - 一种耐压基本盖、易拉盖以及带易拉盖的易拉罐 - Google Patents

一种耐压基本盖、易拉盖以及带易拉盖的易拉罐 Download PDF

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Publication number
WO2019200770A1
WO2019200770A1 PCT/CN2018/097080 CN2018097080W WO2019200770A1 WO 2019200770 A1 WO2019200770 A1 WO 2019200770A1 CN 2018097080 W CN2018097080 W CN 2018097080W WO 2019200770 A1 WO2019200770 A1 WO 2019200770A1
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Prior art keywords
segment
arc segment
circular arc
cover
straight
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Application number
PCT/CN2018/097080
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English (en)
French (fr)
Inventor
安旭
王炳生
熊康
张玮玮
Original Assignee
苏州斯莱克精密设备股份有限公司
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.)
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Application filed by 苏州斯莱克精密设备股份有限公司 filed Critical 苏州斯莱克精密设备股份有限公司
Priority to KR1020207029539A priority Critical patent/KR102400165B1/ko
Priority to AU2018419293A priority patent/AU2018419293B2/en
Priority to US17/047,813 priority patent/US11247809B2/en
Priority to EP18915396.8A priority patent/EP3782920B1/en
Priority to BR112020021005-6A priority patent/BR112020021005B1/pt
Publication of WO2019200770A1 publication Critical patent/WO2019200770A1/zh
Priority to PH12020551551A priority patent/PH12020551551A1/en
Priority to IL277871A priority patent/IL277871A/en

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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
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/06—Integral, or permanently secured, end or side closures
    • 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
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/02—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions of curved cross-section, e.g. cans of circular or elliptical cross-section
    • 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
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/06—Integral, or permanently secured, end or side closures
    • B65D17/08—Closures secured by folding or rolling and pressing
    • 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
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/28—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness
    • 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
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/28—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness
    • B65D17/401—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall
    • B65D17/4012—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall for opening partially by means of a tearing tab
    • 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
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/0001—Details
    • B65D2517/0058—Other details of container end panel
    • B65D2517/0059—General cross-sectional shape of container end panel
    • B65D2517/0061—U-shaped
    • B65D2517/0062—U-shaped and provided with an additional U-shaped peripheral channel

Definitions

  • the invention relates to a basic cover, an easy-open cover and a can, in particular to a pressure-resistant basic cover, an easy-open cover and a can with an easy-open cover.
  • the three segments of the circular arc segment are directly connected, and the end portion of the fifth circular arc segment is directly circumscribed and connected to the end portion of the circular arc segment; and the upward extending portion of the annular ring is composed of the second straight segment and the seventh arc segment.
  • the seventh arc segment is tangentially connected to the central cover surface.
  • the countersunk section is only connected by the first straight section, the fourth arc section and the fifth arc section, the fourth arc segment and the fifth arc segment are externally cut, and the withstand voltage test is performed.
  • the test pressure reaches the withstand voltage limit value, more than 80% of the buried head section of the cover body may be cracked, and the safety of use is poor, that is, the fifth arc segment of the cover body is in actual use during overpressure. Will rupture and the liquid in the tank will splatter outward;
  • the object of the present invention is to provide a pressure resistant basic cover, an easy-opening cover and a can with an easy-opening cover, so as to reduce the probability of occurrence of cracking under pressure failure and improve the safety of use under the premise of the same material thickness and withstand voltage value. Sex and canned stability.
  • the basic cover technical solution adopted by the present invention is: a pressure resistant basic cover, the cross section of the basic cover is a sealing area, a countersunk section, an inset circular arc section, and an inlay from the periphery to the center.
  • the countersunk section comprises a first straight section, a fourth circular section, and a fifth circular arc segment, the first end of the first straight section being connected to the corresponding end of the can sealing area, and the second The end is connected to the first end of the fourth circular arc segment, and the first straight line segment is tangent to the fourth circular arc segment; the second end of the fourth circular arc segment is connected to the first end of the fifth circular arc segment, And the fourth arc segment and the fifth arc segment are circumscribed;
  • the countersunk section further includes a sixth arc segment and a second straight segment, the second end of the fifth arc segment is connected to the first end of the sixth arc segment, and the fifth arc segment Inscribed with the sixth arc segment; the second end of the sixth arc segment is connected to the first end of the second straight segment, and the sixth arc segment is tangent to the second straight segment; The second end of the two straight segments is connected to the first end of the circular arc segment, and the second straight segment is tangent to the circular arc segment;
  • the radius of the fifth arc segment is greater than or equal to 0.25 mm and less than or equal to 2.5 mm;
  • the radius of the sixth arc segment is greater than or equal to 2 mm and less than or equal to 6.5 mm;
  • the radius of the circular arc segment is greater than or equal to 0.25 mm and less than or equal to 0.8 mm;
  • connection point of the second straight line segment and the circular arc segment as an auxiliary point, defining a straight line passing through the auxiliary point perpendicular to the central cover surface as the auxiliary line A; with the auxiliary line A as the boundary, the fifth circle
  • the arc segment, the sixth arc segment and the second straight segment are located on one side of the auxiliary line A, and the inlaid arc segment is located on the other side of the auxiliary line A;
  • the direction of the auxiliary line A is defined as an up and down direction, the side of the basic cover that faces the outside of the can is defined, and the side of the basic cover that faces the inside of the can is downward; in the up and down direction, the sixth arc a center of the segment is located below the upper surface of the central cover; a center of the fourth arc segment and a center of the fifth arc segment on the auxiliary line A are greater than or equal to a fourth arc segment The sum of the radius of the fifth arc segment and the radius of the fifth arc segment is less than or equal to the sum of the radius of the fourth arc segment and the radius of the fifth arc segment;
  • a center of the fourth arc segment and a center of the fifth arc segment in a direction perpendicular to the auxiliary line A is greater than or equal to zero, and less than or equal to a radius of the fourth arc segment and a fifth arc segment 0.5 times the sum of the radii.
  • connection point of the sixth circular arc segment and the second straight straight segment is located below the upper surface of the central cover surface.
  • the angle between the second straight line segment and the auxiliary line A is 5° to 12°.
  • the easy-opening technical solution adopted by the present invention is: a pressure-resistant and easy-to-open cover, comprising a basic cover and a pull ring, and the basic cover adopts the above basic cover technical solution.
  • connection point of the sixth circular arc segment and the second straight straight segment is located below the upper surface of the central cover surface.
  • the angle between the second straight line segment and the auxiliary line A is 5° to 12°.
  • the can technical solution adopted by the present invention is: a pressure-resistant can, comprising a can body and a pull-tab, the easy-opening cover comprising a basic cover and a pull ring, wherein the basic cover adopts the above basic cover technical solution .
  • connection point of the sixth circular arc segment and the second straight straight segment is located below the upper surface of the central cover surface.
  • the angle between the second straight line segment and the auxiliary line A is 5° to 12°.
  • the design principle of the invention is: the invention is based on the prior art and has passed a detailed and in-depth study for a whole year, and then finds an effective method for reducing the probability of occurrence of cracking failure of the withstand voltage failure: adding a sixth to the countersunk section
  • the arc segment R6 and the second straight segment L2 and the detailed study of the fifth arc segment R5, the sixth arc segment R6, and the fourth arc segment R4, the fifth arc segment R5
  • the technical characteristics such as the positional relationship of the center finally succeeded in reducing the probability of occurrence of cracking when the withstand voltage fails to 0.05% to 2.5%. , greatly improving the security of use.
  • the prior art basically covers the state in which most of the cracking occurs as shown in the photograph of Fig. 3, and the probability of cracking is 80%; while the basic cover of the embodiment of the present invention maintains the drum as shown in the photograph of Fig. 4.
  • the failure state did not occur, and the probability of failure was only 0.05% to 2.5%.
  • the second straight line segment L2 of the basic cover of the present invention can form a surface contact with the can sealing mold 2 (commonly known as the head), thereby increasing the contact area and greatly improving the sealing.
  • Tank stability when sealing the can, the second straight line segment L2 of the basic cover of the present invention can form a surface contact with the can sealing mold 2 (commonly known as the head), thereby increasing the contact area and greatly improving the sealing. Tank stability.
  • FIG. 1 is a partial schematic cross-sectional view of a basic cover according to an embodiment of the present invention
  • FIG. 2 is a schematic view showing the cooperation of the basic cover in the case of sealing the can and the sealing mold according to the embodiment of the present invention
  • Figure 3 is a photograph showing the state of the basic cover of the prior art after the withstand voltage test
  • Fig. 4 is a photograph showing the state of the basic cover after the withstand voltage test according to the embodiment of the present invention.
  • Embodiment 1 Referring to Figure 1, a pressure resistant basic cover:
  • a pressure-resistant basic cover as shown in FIG. 1 , the cross-section of the basic cover from the periphery to the center is a sealing area, a countersunk section, an inset circular arc section R7, an inwardly extending section of the collar, and a center cover surface. .
  • the sealing area is formed by sequentially connecting a first circular arc segment R1, a second circular arc segment R2 and a third circular arc segment R3, and the first circular arc segment R1 and the second circular arc segment are sequentially connected.
  • R2 is inscribed, and the second arc segment R2 and the third arc segment R3 are inscribed.
  • the countersunk head section includes a first straight line segment L1, a fourth arc segment R4, and a fifth arc segment R5.
  • the first end of the first straight segment L1 is connected to the corresponding end of the can sealing area.
  • the second end is connected to the first end of the fourth arc segment R4, and the first straight segment L1 is tangent to the fourth arc segment R4; the second end and the fifth arc of the fourth arc segment R4 are The first end of the segment R5 is connected, and the fourth arc segment R4 is circumscribed with the fifth arc segment R5.
  • the countersunk section further includes a sixth arc segment R6 and a second straight segment L2, and the second end of the fifth arc segment R5 and the first end of the sixth arc segment R6
  • the end is connected, and the fifth arc segment R5 and the sixth arc segment R6 are inscribed; the second end of the sixth arc segment R6 is connected to the first end of the second straight segment L2, and the sixth circle
  • the arc segment R6 is tangent to the second straight segment L2.
  • the second end of the second straight line segment L2 is connected to the first end of the circular arc segment R7, and the second straight line segment L2 is tangent to the annular arc segment R7.
  • the radius of the fifth circular arc segment R5 is greater than or equal to 0.25 mm and less than or equal to 2.5 mm; the radius of the sixth circular arc segment R6 is greater than or equal to 2 mm and less than or equal to 6.5 mm; The radius of the arc segment R7 is greater than or equal to 0.25 mm and less than or equal to 0.8 mm.
  • connection point of the second straight line segment L2 and the circular arc segment R7 is defined as the auxiliary point Q1
  • the straight line passing through the auxiliary point Q1 perpendicular to the center cover surface is defined as the auxiliary line A
  • the auxiliary line A is bounded
  • the fifth arc segment R5, the sixth arc segment R6 and the second straight segment L2 are located on one side of the auxiliary line A
  • the inlaid arc segment R7 is located at the auxiliary line A. side.
  • the direction of the auxiliary line A is defined as the up and down direction, the side of the basic cover that faces the outside of the can is defined, and the side of the basic cover that faces the inside of the can is the lower; in the up and down direction
  • the center Y6 of the sixth arc segment R6 is located below the upper surface L4 of the central cover surface;
  • the projection distance H1 of the center Y4 of the fourth arc segment R4 and the center Y5 of the fifth arc segment R5 on the auxiliary line A is greater than or equal to the fourth arc.
  • the sum of the radius of the segment R4 and the radius of the fifth arc segment R5 is 0.85 times, and is less than or equal to the sum of the radius of the fourth arc segment R4 and the radius of the fifth arc segment R5.
  • the projection distance W1 of the center Y4 of the fourth circular arc segment R4 and the center Y5 of the fifth circular arc segment R5 in the direction perpendicular to the auxiliary line A is greater than or equal to zero, and is less than or equal to the radius of the fourth circular arc segment R4. 0.5 times the sum of the radii of the fifth arc segment R5.
  • connection point Q2 of the sixth arc segment R6 and the second straight segment L2 is located below the upper surface L4 of the center cover surface in the up and down direction. This will achieve better resistance to cracking.
  • the angle ⁇ between the second straight line segment L2 and the auxiliary line A is 5° to 12°.
  • the upwardly extending section of the collar is composed of a third straight section L3 and an eighth circular arc section R8, and one end of the third straight section L3 is tangentially connected with the circular arc section R7, and the second end and the eighth circular arc section are connected
  • the first end of the R8 is tangentially connected
  • the second end of the eighth circular arc segment R8 is tangentially connected to the central cover surface L4.
  • the center cover surface L4 may be a flat surface or a substantially flat surface including a partially curved surface.
  • all the dimensions referring to "arc segment” and “straight line segment” refer to the size of the line segment on the side surface of the base cover facing the outside of the can (i.e., the upward direction of Fig. 1).
  • the probability of occurrence of cracking at the time of failure of the pressure resistance of the present embodiment is only 0.05% to 2.5%, and the safety of use is greatly improved.
  • the second straight line segment L2 of the basic cover of the present invention can be in surface contact with the can sealing mold 2 (commonly known as the head), which increases the contact area and greatly improves the stability of the sealing can. Sex.
  • the second embodiment is a pressure-resistant and easy-to-open cover, which includes a basic cover and a pull ring.
  • the structure of the basic cover is the same as that in the first embodiment, and details are not described herein.
  • Embodiment 3 A pressure-resistant can, comprising a can body and an easy-opening cover, the easy-opening cover comprises a basic cover and a pull ring, and the structure of the basic cover is the same as that of the first embodiment, and details are not described herein.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Closures For Containers (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)
  • Sewage (AREA)
  • Mechanical Coupling Of Light Guides (AREA)

Abstract

一种耐压基本盖、易拉盖以及带易拉盖的易拉罐，该基本盖的横截面上从周边至中心依次为封罐区域、埋头段、嵌环圆弧段(R7)、嵌环向上延伸段以及中心盖面；埋头段还包括一第六圆弧段(R6)以及一第二直线段(L2)，第六圆弧段(R6)与第二直线段(L2)相切，第二直线段(L2)与嵌环圆弧段(R7)相切；第六圆弧段(R6)的圆心(Y6)位于所述中心盖面的上表面(L4)之下。本发明的耐压失效发生破裂的概率降至0.05％～2.5％，大幅地提高了使用的安全性。

Description

一种耐压基本盖、易拉盖以及带易拉盖的易拉罐 技术领域
本发明涉及基本盖、易拉盖以及易拉罐，特别涉及一种耐压型的基本盖、易拉盖以及带易拉盖的易拉罐。
背景技术
易拉盖问世于上个世纪60年代，广泛应用于饮料罐、啤酒罐的配套包装。由于重量轻、体积小、废料可重复使用的诸多优点，易拉盖在全世界范围内得到大力推广，并形成庞大的生产规模。随着易拉盖市场需求的不断增长，易拉盖产业也迅速发展，竞争也越来越激烈，因此为了节约资源，降低成本适应市场竞争的需要，研究开发一种节省材料的耐压易拉盖不仅是企业生存和发展的需要，而且也是市场经济发展的必然。
现有技术中，具代表性的结构参见本案申请人在之前申请的一专利CN106672390A。该专利公开的易拉盖结构为：由盖体和铆接于盖体上的拉环两部分构成；所述盖体横截面上从盖体周边至中心依次为封罐区域、埋头段、嵌环圆弧段、嵌环向上延伸段以及中心盖面，所述埋头段和嵌环向上延伸段之间形成环形凹槽；所述埋头段仅由第一直线段、第四圆弧段、第五圆弧段三段直接连接而成，第五圆弧段的端部与嵌环圆弧段的端部直接外切连接；而嵌环向上延伸段由第二直线段和第七圆弧段组成，第七圆弧段与中心盖面相切连接。该专利方案在省材料的前提下耐压性能好，但是，在实际制作中仍发现有以下不足之处：
一、由于其埋头段仅由第一直线段、第四圆弧段、第五圆弧段三段连接而成，第四圆弧段和第五圆弧段为外切，在做耐压试验时，当试验压力达到耐压极限值时，在盖体的埋头段处有80％以上可能发生破裂，使用安全性较差，即实际使用中超压时该盖体的第五圆弧段处就会破裂，罐内液体会向外喷溅；
二、由于其埋头段与嵌环圆弧段的连接处是圆弧对圆弧的外切连接，在封罐时基本盖与封罐模具(俗称扎头)的接触面积过小，仅为线接触，导致封罐的不稳定，封罐质量不易保证。
发明内容
本发明目的是提供一种耐压基本盖、易拉盖以及带易拉盖的易拉罐，以在同等材料厚度、耐压值不变的前提下，降低耐压失效发生破裂的概率，提升使用安全性以及封罐稳定性。
为达到上述目的，本发明采用的基本盖技术方案是：一种耐压基本盖，该基本盖的横截面上从周边至中心依次为封罐区域、埋头段、嵌环圆弧段、嵌环向上延伸段以及中心 盖面；所述埋头段包括第一直线段、第四圆弧段、第五圆弧段，第一直线段的第一端与封罐区域的对应端连接，其第二端与第四圆弧段的第一端连接，且第一直线段与第四圆弧段相切；所述第四圆弧段的第二端与第五圆弧段的第一端连接，且第四圆弧段与第五圆弧段外切；
所述埋头段还包括一第六圆弧段以及一第二直线段，所述第五圆弧段的第二端与所述第六圆弧段的第一端连接，且第五圆弧段与第六圆弧段内切；所述第六圆弧段的第二端与所述第二直线段的第一端连接，且第六圆弧段与第二直线段相切；所述第二直线段的第二端与嵌环圆弧段的第一端连接，且第二直线段与嵌环圆弧段相切；
所述第五圆弧段的半径大于或等于0.25mm，且小于或等于2.5mm；
所述第六圆弧段的半径大于或等于2mm，且小于或等于6.5mm；
所述嵌环圆弧段的半径大于或等于0.25mm，且小于或等于0.8mm；
定义所述第二直线段与嵌环圆弧段的连接点为辅助点，将通过辅助点的垂直于中心盖面的直线定义为辅助线A；以辅助线A为界，所述第五圆弧段、第六圆弧段及第二直线段位于辅助线A的一侧，而嵌环圆弧段位于辅助线A的另一侧；
将所述辅助线A的方向定义为上下方向，定义基本盖的朝罐外那侧为上，基本盖的朝罐内的那侧为下；在所述上下方向上，所述第六圆弧段的圆心位于所述中心盖面的上表面之下；所述第四圆弧段的圆心和所述第五圆弧段的圆心在辅助线A上的投影距离大于或等于第四圆弧段的半径与第五圆弧段的半径之和的0.85倍，且小于或等于第四圆弧段的半径与第五圆弧段的半径之和；
所述第四圆弧段的圆心和所述第五圆弧段的圆心在垂直于辅助线A方向的投影距离大于或等于零，且小于或等于第四圆弧段的半径与第五圆弧段的半径之和的0.5倍。
进一步，在所述上下方向上，所述第六圆弧段与第二直线段的连接点位于所述中心盖面的上表面之下。
进一步，所述第二直线段与所述辅助线A的夹角为5°～12°。
为达到上述目的，本发明采用的易拉盖技术方案是：一种耐压易拉盖，包括基本盖及拉环，所述基本盖采和上述基本盖技术方案。
进一步，在所述上下方向上，所述第六圆弧段与第二直线段的连接点位于所述中心盖面的上表面之下。
进一步，所述第二直线段与所述辅助线A的夹角为5°～12°。
为达到上述目的，本发明采用的易拉罐技术方案是：一种耐压易拉罐，包括罐体及易拉盖，所述易拉盖包括基本盖及拉环，所述基本盖采用上述基本盖技术方案。
进一步，在所述上下方向上，所述第六圆弧段与第二直线段的连接点位于所述中心 盖面的上表面之下。
进一步，所述第二直线段与所述辅助线A的夹角为5°～12°。
本发明的设计原理是：本发明是在现有技术的基础上通过了整整一年的详细深入研究，才找到了降低耐压失效发生破裂的概率的有效方法：对埋头段增加了一第六圆弧段R6以及一第二直线段L2，并且详细研究才得到了第五圆弧段R5、第六圆弧段R6的合理尺寸，以及第四圆弧段R4、第五圆弧段R5的圆心位置关系等技术特征才最终成功地将耐压失效时发生破裂的概率降至0.05％～2.5％。，大幅地提高了使用的安全性。
在同等的耐压测试条件下，现有技术基本盖有大部分发生了破裂如图3照片的状态，破裂概率是80％；而本发明实施例基本盖却保持如图4照片所示的鼓起失效状态，并没有发生破裂，破裂概率仅是0.05％～2.5％。
现有技术与本发明的耐压测试对比如下：
Figure PCTCN2018097080-appb-000001
Figure PCTCN2018097080-appb-000002
Figure PCTCN2018097080-appb-000003
Figure PCTCN2018097080-appb-000004
Figure PCTCN2018097080-appb-000005
另一方面，如图2所示，在封罐时，本发明基本盖的第二直线段L2能与封罐模具2(俗称扎头)形成面接触，增大了接触面积，大幅提升了封罐稳定性。
本发明虽看似并不复杂，但却带来了上述突出的意想不到的效果，这在本领域是一重要突破。
附图说明
图1为本发明实施例一基本盖横截面局部示意图；
图2为本发明实施例一基本盖在封罐时与封罐模具的配合示意图；
图3为现有技术基本盖在耐压试验后的状态照片；
图4为本发明实施例基本盖在耐压试验后的状态照片。
具体实施方式
下面结合附图及实施例对本发明作进一步描述：
实施例一：参见附图1所示，一种耐压基本盖：
一种耐压基本盖，参见附图1所示，该基本盖的横截面上从周边至中心依次为封罐区域、埋头段、嵌环圆弧段R7、嵌环向上延伸段以及中心盖面。
参见附图1所示，所述封罐区域由第一圆弧段R1、第二圆弧段R2以及第三圆弧段R3依次连接而成，第一圆弧段R1与第二圆弧段R2内切，第二圆弧段R2与第三圆弧段R3内切。
参见附图1所示，所述埋头段包括第一直线段L1、第四圆弧段R4、第五圆弧段R5，第一直线段L1的第一端与封罐区域的对应端连接，其第二端与第四圆弧段R4的第一端连接，且第一直线段L1与第四圆弧段R4相切；所述第四圆弧段R4的第二端与第五圆弧段R5的第一端连接，且第四圆弧段R4与第五圆弧段R5外切。本实施例主要点是，埋头段还包括一第六圆弧段R6以及一第二直线段L2，所述第五圆弧段R5的第二端与所述第六圆弧段R6的第一端连接，且第五圆弧段R5与第六圆弧段R6内切；所述第六圆弧段R6的第二端与所述第二直线段L2的第一端连接，且第六圆弧段R6与第二直线段L2相切。所述第二直线段L2的第二端与嵌环圆弧段R7的第一端连接，且第二直线段L2与嵌环圆弧段R7相切。
所述第五圆弧段R5的半径大于或等于0.25mm，且小于或等于2.5mm；所述第六圆弧段R6的半径大于或等于2mm，且小于或等于6.5mm；所述嵌环圆弧段R7的半径大于或等于0.25mm，且小于或等于0.8mm。
参见附图1所示，定义所述第二直线段L2与嵌环圆弧段R7的连接点为辅助点Q1，将通过辅助点Q1的垂直于中心盖面的直线定义为辅助线A，以该辅助线A为界，所述第五圆弧段R5、第六圆弧段R6及第二直线段L2位于辅助线A的一侧，而嵌环圆弧段R7位于辅助线A的另一侧。
参见附图1所示，将所述辅助线A的方向定义为上下方向，定义基本盖的朝罐外那侧为上，基本盖的朝罐内的那侧为下；在所述上下方向上，所述第六圆弧段R6的圆心Y6位于所述中心盖面的上表面L4之下；
参见附图1所示，并且，具体的所述第四圆弧段R4的圆心Y4和所述第五圆弧段R5的圆心Y5在辅助线A上的投影距离H1大于或等于第四圆弧段R4的半径与第五圆弧段R5的半径之和的0.85倍，且小于或等于第四圆弧段R4的半径与第五圆弧段R5的半径之和。
所述第四圆弧段R4的圆心Y4和所述第五圆弧段R5的圆心Y5在垂直于辅助线A方向的投影距离W1大于或等于零，且小于或等于第四圆弧段R4的半径与第五圆弧段R5 的半径之和的0.5倍。
参见附图1所示，较佳是：在所述上下方向上，所述第六圆弧段R6与第二直线段L2的连接点Q2要位于所述中心盖面的上表面L4之下，如此能达到更佳的抗破裂性能。
参见附图1所示，较佳是：所述第二直线段L2与所述辅助线A的夹角α为5°～12°。
所述嵌环向上延伸段由第三直线段L3和第八圆弧段R8组成，第三直线段L3的一端与嵌环圆弧段R7相切连接，其第二端与第八圆弧段R8的第一端相切连接，第八圆弧段R8的第二端与中心盖面L4相切连接。中心盖面L4可以是一平面也可以是包括局部弯曲面的大致的平面。
上述实施例中，所有提及“圆弧段”、“直线段”的尺寸都是指基本盖的朝罐外(即附图1的朝上方向)的那侧表面上的线段的尺寸。
本实施例的耐压失效时发生破裂的概率仅0.05％～2.5％，大幅地提高了使用的安全性。并且，在封罐时如图2所示，，本发明基本盖的第二直线段L2能与封罐模具2(俗称扎头)形成面接触，增大了接触面积，大幅提升了封罐稳定性。
实施例二：一种耐压易拉盖，包括基本盖及拉环，所述基本盖的结构同实施例一所述，这里不再赘述。
实施例三：一种耐压易拉罐，包括罐体及易拉盖，所述易拉盖包括基本盖及拉环，所述基本盖的结构同实施例一所述，这里不再赘述。
上述实施例只为说明本发明的技术构思及特点，其目的在于让熟悉此项技术的人士能够了解本发明的内容并据以实施，并不能以此限制本发明的保护范围。凡根据本发明精神实质所作的等效变化或修饰，都应涵盖在本发明的保护范围之内。

Claims (9)

  1. 一种耐压基本盖，该基本盖的横截面上从周边至中心依次为封罐区域、埋头段、嵌环圆弧段(R7)、嵌环向上延伸段以及中心盖面；所述埋头段包括第一直线段(L1)、第四圆弧段(R4)、第五圆弧段(R5)，第一直线段(L1)的第一端与封罐区域的对应端连接，其第二端与第四圆弧段(R4)的第一端连接，且第一直线段(L1)与第四圆弧段(R4)相切；所述第四圆弧段(R4)的第二端与第五圆弧段(R5)的第一端连接，且第四圆弧段(R4)与第五圆弧段(R5)外切；其特征在于：
    所述埋头段还包括一第六圆弧段(R6)以及一第二直线段(L2)，所述第五圆弧段(R5)的第二端与所述第六圆弧段(R6)的第一端连接，且第五圆弧段(R5)与第六圆弧段(R6)内切；所述第六圆弧段(R6)的第二端与所述第二直线段(L2)的第一端连接，且第六圆弧段(R6)与第二直线段(L2)相切；所述第二直线段(L2)的第二端与嵌环圆弧段(R7)的第一端连接，且第二直线段(L2)与嵌环圆弧段(R7)相切；
    所述第五圆弧段(R5)的半径大于或等于0.25mm，且小于或等于2.5mm；
    所述第六圆弧段(R6)的半径大于或等于2mm，且小于或等于6.5mm；
    所述嵌环圆弧段(R7)的半径大于或等于0.25mm，且小于或等于0.8mm；
    定义所述第二直线段(L2)与嵌环圆弧段(R7)的连接点为辅助点(Q1)，将通过辅助点(Q1)的垂直于中心盖面的直线定义为辅助线A；以辅助线A为界，所述第五圆弧段(R5)、第六圆弧段(R6)及第二直线段(L2)位于辅助线A的一侧，而嵌环圆弧段(R7)位于辅助线A的另一侧；
    将所述辅助线A的方向定义为上下方向，定义基本盖的朝罐外那侧为上，基本盖的朝罐内的那侧为下；在所述上下方向上，所述第六圆弧段(R6)的圆心(Y6)位于所述中心盖面的上表面(L4)之下；
    所述第四圆弧段(R4)的圆心(Y4)和所述第五圆弧段(R5)的圆心(Y5)在辅助线A上的投影距离(H1)大于或等于第四圆弧段(R4)的半径与第五圆弧段(R5)的半径之和的0.85倍，且小于或等于第四圆弧段(R4)的半径与第五圆弧段(R5)的半径之和；所述第四圆弧段(R4)的圆心(Y4)和所述第五圆弧段(R5)的圆心(Y5)在垂直于辅助线A方向的投影距离(W1)大于或等于零，且小于或等于第四圆弧段(R4)的半径与第五圆弧段(R5)的半径之和的0.5倍。
  2. 根据权利要求1所述耐压基本盖，其特征在于：在所述上下方向上，所述第六圆弧段(R6)与第二直线段(L2)的连接点(Q2)位于所述中心盖面的上表面(L4)之下。
  3. 根据权利要求1所述耐压基本盖，其特征在于：所述第二直线段(L2)与所述辅助线A的夹角(α)为5°～12°。
  4. 一种耐压易拉盖，包括基本盖及拉环，其特征在于：所述基本盖为权利要求1所述的基本盖。
  5. 根据权利要求4所述耐压易拉盖，其特征在于：在所述上下方向上，所述第六圆弧段(R6)与第二直线段(L2)的连接点(Q2)位于所述中心盖面的上表面(L4)之下。
  6. 根据权利要求4所述耐压易拉盖，其特征在于：所述第二直线段(L2)与所述辅助线A的夹角(α)为5°～12°。
  7. 一种耐压易拉罐，包括罐体及易拉盖，所述易拉盖包括基本盖及拉环，其特征在于：所述基本盖为权利要求1所述的基本盖。
  8. 根据权利要求7所述耐压易拉罐，其特征在于：在所述上下方向上，所述第六圆弧段(R6)与第二直线段(L2)的连接点(Q2)位于所述中心盖面的上表面(L4)之下。
  9. 根据权利要求7所述耐压易拉罐，其特征在于：所述第二直线段(L2)与所述辅助线A的夹角(α)为5°～12°。
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IL277871A (en) 2020-11-30
CN108438434B (zh) 2023-12-15
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AU2018419293B2 (en) 2022-07-07
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US20210139193A1 (en) 2021-05-13
KR20200140287A (ko) 2020-12-15
EP3782920A4 (en) 2022-01-19
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US11247809B2 (en) 2022-02-15

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