TWI250122B - Synthetic resin cap, and method and device for manufacturing the synthetic resin cap - Google Patents

Synthetic resin cap, and method and device for manufacturing the synthetic resin cap Download PDF

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Publication number
TWI250122B
TWI250122B TW90111532A TW90111532A TWI250122B TW I250122 B TWI250122 B TW I250122B TW 90111532 A TW90111532 A TW 90111532A TW 90111532 A TW90111532 A TW 90111532A TW I250122 B TWI250122 B TW I250122B
Authority
TW
Taiwan
Prior art keywords
seal
mold
shape
synthetic resin
cover
Prior art date
Application number
TW90111532A
Other languages
Chinese (zh)
Inventor
Kazuyuki Yamada
Original Assignee
Alcoa Closure Systems Japan
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
Priority to JP2000147041A priority Critical patent/JP2001328653A/en
Application filed by Alcoa Closure Systems Japan filed Critical Alcoa Closure Systems Japan
Application granted granted Critical
Publication of TWI250122B publication Critical patent/TWI250122B/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/40Removing or ejecting moulded articles
    • B29C45/44Removing or ejecting moulded articles for undercut articles
    • B29C45/4407Removing or ejecting moulded articles for undercut articles by flexible movement of undercut portions of the articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D41/00Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/02Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
    • B65D41/04Threaded or like caps or cap-like covers secured by rotation
    • B65D41/0407Threaded or like caps or cap-like covers secured by rotation with integral sealing means
    • B65D41/0414Threaded or like caps or cap-like covers secured by rotation with integral sealing means formed by a plug, collar, flange, rib or the like contacting the internal surface of a container neck
    • B65D41/0421Threaded or like caps or cap-like covers secured by rotation with integral sealing means formed by a plug, collar, flange, rib or the like contacting the internal surface of a container neck and combined with integral sealing means contacting other surfaces of a container neck
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D41/00Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/32Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
    • B65D41/34Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt
    • B65D41/3423Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with flexible tabs, or elements rotated from a non-engaging to an engaging position, formed on the tamper element or in the closure skirt
    • B65D41/3428Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with flexible tabs, or elements rotated from a non-engaging to an engaging position, formed on the tamper element or in the closure skirt the tamper element being integrally connected to the closure by means of bridges
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/56Stoppers or lids for bottles, jars, or the like, e.g. closures
    • B29L2031/565Stoppers or lids for bottles, jars, or the like, e.g. closures for containers

Abstract

To provide a synthetic resin cap excellent in sealability, a method and an apparatus for manufacturing the cap. The synthetic resin cap includes a top plate 32 and a cylinder 33 hanging from its periphery. An annular inner seal 34 is formed to protrude on an internal top surface of the top plate 32, and a thin part 35 which is thinner in thickness than other parts is formed in the vicinity of a base end of the inner seal 34.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin cap that can close an opening of a container, a method of manufacturing a synthetic resin cap, and a manufacturing apparatus therefor. Background of the Invention Referring to Figure 12, there is shown an embodiment of a conventional synthetic resin cover. The synthetic resin cover 51 of the closing device which is not in this example has a top plate portion 32 and a cylindrical portion 33 which is suspended from the periphery thereof. The tubular portion 33 is divided into the upper half of the main body 38 by a horizontal score 36, and the TE ring portion 39 located at the lower end of the main body 38 is connected by a plurality of thin bridges 37. A threaded portion 40 is formed on the inner wall surface of the main body 38 to be screwed to the male thread of the container opening. A plurality of thin plate-shaped tabs 41 are provided on the inner wall surface of the TE ring portion 39 to prevent the movement of the TE ring portion 39 when the lid 51 is opened on the container. A ring-shaped inner seal portion 54 is formed on the inner surface of the top plate portion 32 so as to be fitted into the container opening portion when the cover 51 is attached to the container opening portion. The inner seal portion 54 is formed to be in contact with the inner wall surface of the outer periphery of the container opening without a gap when fitted into the opening of the container. It is possible to mount a container made of the above synthetic resin, in particular, a container formed of a synthetic resin such as polyethylene terephthalate, and it is difficult to completely form a fixed thickness or shape in the opening, thereby making the container variability (variability) The size of the ). In this case, the pressing force of the inner seal portion corresponding to the inner surface of the opening portion of the container becomes higher at a local portion, and the opening torque is excessively increased, and further between the inner seal portion and the container opening portion. Create gaps and reduce their tightness. 1250122 7641 pif 1 Description of the Invention In view of the above, the object of the present invention is as follows. (1) The present invention provides a synthetic resin cover, a method of manufacturing the cover, and a manufacturing apparatus thereof, so that the opening torque can be maintained at a predetermined level even in the case of a container having dimensional variability. (2) The present invention provides a synthetic resin cover having excellent sealing performance, a method of manufacturing the cover, and a manufacturing apparatus therefor. The synthetic resin cover of the present invention has a top plate portion and a tubular portion that is suspended from the periphery thereof, and is characterized in that an annular inner seal portion that can be fitted into the opening of the container is formed on the inner surface of the top plate portion, and is formed in the inner seal portion. A thin portion which is thinner than the other portions is formed near the base end. In the synthetic resin cover, the tortuous rigidity of the inner seal portion of the thin portion is set to be low, so that the inner seal portion has complete flexibility. Therefore, the inner seal portion is attached when the cover is attached to the container opening portion. The inner surface of the opening of the container can be easily bent and deformed, and can be brought into contact with the inner surface of the opening of the container at a constant pressing force in the peripheral direction. Therefore, even in the case of a container having dimensional variability, the opening torque can be maintained at a predetermined level, and the sealing property is remarkably improved. The thin portion is formed on the outer circumference of the inner seal portion, and a thinned concave portion is formed on the thin portion. The method for producing a synthetic resin cap according to the present invention is to manufacture a ring-shaped inner seal portion having a top plate portion and a tubular portion suspended from the peripheral edge thereof, and an inner surface of the top plate portion, and a proximal end portion of the inner seal portion. A method for producing a synthetic resin cover having a thinner portion thinner than the other portions, wherein the inner surface side mold having a shape in which the inner surface of the cover is cut and the outer surface of the outer surface of the cover 1250122 7641 pif 1 are formed in a shape The side mold is characterized in that the inner surface side mold body having the inner surface shape having the shape of the inner surface of the inner side seal portion and the outer surface side mold having the outer shape of the outer shape of the inner side seal portion are provided, and The outer cylinder member and the inner surface side mold body are relatively movable in a direction in which the inner side seal portion protrudes, and the synthetic resin material is filled in a gap between the inner surface side mold and the outer side mold, and is formed. Thereafter, the inner surface side mold is pulled out from the formed lid, that is, the outer cylinder member and the inner surface side mold body are disposed inside the protruding end of the inner side sealing portion. After moving the position, the inner side mold is pulled out. In the process of pulling out, the inner seal portion is moved inwardly from the vicinity of the front end portion, and the outer diameter of the inner seal portion is not reduced. Therefore, the inner seal portion does not increase excessive force and the inner surface can be smoothly performed. Pull out the side mold. Therefore, it is possible to prevent the formation of an abnormal protruding portion such as a concave portion, the breakage of a crack or the like, the stretching deformation, the breakage, and the like in the inner seal portion due to the excessive partial pressure of the inner seal portion corresponding to the inner surface of the opening portion of the container. The deformation or breakage of the inner seal portion prevents a gap between the inner seal portion and the inner surface of the container opening portion, and maintains the opening torque at the set opening to improve the sealing performance. The apparatus for manufacturing a synthetic resin cap according to the present invention is for manufacturing a ring-shaped inner seal portion having a top plate portion and a cylindrical portion suspended from the periphery thereof, and forming an inner surface of the top plate portion, and a base portion of the inner seal portion. A synthetic resin cap manufacturing apparatus for forming a synthetic resin cap having a thinner wall portion thinner than the other portion in the vicinity of the end, the device having an inner surface side mold having a shape in which the inner surface of the cap is cut and having a shape conforming to the outer surface of the cap The outer side mold is characterized in that it has an inner surface side mold main body having a shape in which the inner surface of the inner side seal portion is cut, and an inner surface side mold having a shape in which the outer side of the inner side seal portion is formed, and the outer tube portion 1250122 7641 pif The one piece and the inner side mold main system can be relatively moved along the protruding direction of the inner side seal portion. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view showing a synthetic resin cover according to a preferred embodiment of the present invention. Fig. 2 is a partially enlarged view showing the synthetic resin cover shown in Fig. 1. Fig. 3 is a cross-sectional view showing a manufacturing apparatus for a synthetic resin cover according to a preferred embodiment of the present invention. Fig. 4 is an explanatory view showing the operation of the manufacturing apparatus shown in Fig. 3. Fig. 5 is an explanatory view showing the operation of the manufacturing apparatus shown in Fig. 3. Fig. 6 is an explanatory view showing the operation of the manufacturing apparatus shown in Fig. 3. Fig. 7 is an explanatory view showing the operation of the manufacturing apparatus shown in Fig. 3. Fig. 8 is an explanatory view showing the operation of the manufacturing apparatus shown in Fig. 3. Fig. 9 is a partially enlarged plan view showing a synthetic resin cover according to another preferred embodiment of the present invention. Fig. 10 is a partially enlarged plan view showing a synthetic resin cover according to another preferred embodiment of the present invention. Fig. 1 is a partially enlarged plan view showing a synthetic resin cover according to another preferred embodiment of the present invention. Fig. 12 is a cross-sectional view showing an embodiment of a conventional synthetic resin cover. Description of the drawings: 1: manufacturing apparatus 2: inner side mold 3 = outer side mold 4: end side mold 4a: cylindrical member 1250122 7641 pif 1 5: inner side mold main body 6: outer cylinder member 8: Bearing 9: top cover portion 10: bearing insertion portion 11: top cover portion accommodating portion 12: inner seal portion forming notch 12a: thinned recess forming convex portion 13: outer cylinder member insertion portion 14: forming space 31, 51 : cover 32 : top plate portion 33 : cylindrical portion 34 , 54 : inner sealing portion 34 a , 44 a , 54 a , 65 a : thinned concave portion 34 b : contact convex portion 34 c : protruding end 34 d : upper edge portion 34 e : bottom portion 34 f, 44 f : lower Edge portion 34g: convex portion 35, 45, 55, 65: thin wall 咅^ 36: horizontal mold mark 37: bridge portion 38: main body 39: TE ring portion 1250122 7641 pif 1 4 〇: thread 41: ear protector 42: outer seal Part A: Projection Length B: Maximum Tilt Angle C: Depth D: Thickness E: Width Description of Preferred Embodiments FIGS. 1 and 2 show an embodiment of a synthetic resin cover, which is not: The cover 31 is a cover called a 〇ne-piece dress cap, and has a disk-shaped top plate portion 32 and a cylindrical portion 33 suspended from the periphery thereof. The tubular portion 33 is divided into the upper half of the main body 38 by the horizontal die mark 36, and the Tamper-Evidence Ring (hereinafter referred to as TE) is connected to the lower end of the main body 38 by a plurality of thin bridges 37. Ring) 39. A threaded portion 40 is formed on the inner wall surface of the main body 38. A plurality of ear protectors 41 which are undulating inwardly are provided along the circumferential direction of the inner wall surface of the TE ring portion 39. An annular inner seal portion 34 that protrudes downward in the vertical direction is formed on the inner surface of the top plate portion 32 so as to be fitted into the container opening portion when the cover 31 is attached to the container opening portion. The protruding length of the inner sealing portion 34, that is, the protruding length A shown in Fig. 2 is preferably between 2.5 mm and 5.5 mm (more preferably between 3 mm and 5 mm, and most preferably between 3.5 mm and 4.5 mm). Between mm). When the protruding length A does not reach the above range, the sealing of the container is released in advance when the opening is opened, so that the Tamper-Evidence is deteriorated. When the length A exceeds the above range, the inner side of the mounting cover is closed. 10 1250122 7641 pif 1 The sealing portion 34 does not coincide with the opening of the container to be embedded. In the synthetic resin cover of the present embodiment, a thinned concave portion 34a which is thinned over the entire circumference is formed on the outer periphery of the proximal end of the inner seal portion 34, and the thinned concave portion 34a is formed to reduce the thickness of the inner seal portion 34. In the outer peripheral side of the base end portion of the inner seal portion 34, as shown in Fig. 2, a convex portion 34g having a semicircular cross section is formed in a ring shape. The thinned recessed portion 3 is formed into a thin portion 35' which is higher in flexibility than the inner seal portion 34, and has an upper edge portion 34d having a curved cross-sectional shape on the inner side, a bottom portion 34e along the vertical direction, and a curved portion on the outer side. The lower edge portion 34f of the cross-sectional shape. The thinned concave portion 34a is formed at a maximum inclination angle with respect to the vertical direction of the outer surface of the lower edge portion 34f, that is, the maximum inclination angle B shown in Fig. 2 is preferably 90 degrees or less (more preferably 6 degrees or less, most Good for 30 degrees or less). When the maximum inclination angle B exceeds the above range, the lid forming mold stops at the lower edge portion 34f, and the inner seal portion 34 is deformed or broken. The depth of the thinned recess 34a, that is, the depth C shown in FIG. 2 is preferably between 0.1 mm and 2 mm (more preferably between 0.3 mm and 1.5 mm, and the optimum is between 〇. 5mm~1mm). When the depth C does not reach the above range, the softness of the thin portion 35 to the inner side seal portion 34 is lowered, resulting in an increase in the opening torque of the cover 31. At the same time, the sealing of the cover 31 is lowered. Further, when the depth C exceeds the above range, the strength of the inner wall portion 34 of the thin portion 35 is not fully achieved, and the inner seal portion 34 is deformed when the inner seal portion 34 is fitted into the opening portion of the container (bottom portion). Bending deformation, etc.), thereby reducing its sealing. 11 1250122 7641 pif 1 The thickness of the thin portion 35, that is, the thickness D shown in Fig. 2 is preferably between 1 mm and 2.2 mm (more preferably between 1.2 mm and 2 mm, the best system) Between 1.4mm~1.8mm). When the thickness D does not reach the above range, the strength of the thin portion 35 to the inner seal portion 34 is not fully achieved, and the inner seal portion 34 is deformed when the inner seal portion 34 is fitted into the opening portion of the container (bottom bend) Deformation, etc.), thereby reducing its tightness. Further, when the thickness D exceeds the above range, the flexibility of the thin portion 35 to the inner seal portion 34 is lowered, and the opening torque of the lid 31 is increased. At the same time, the sealing of the cover 31 is lowered. The width of the thinned concave portion 34a, that is, the width E shown in Fig. 2 is preferably between 0.5 mm and 2.5 mm (more preferably between 0.8 mm and 2 mm, and the optimum is between 1 mm and mm). Between 1.5mm). When the depth E does not reach the above range, the softness of the thin portion 35 to the inner side seal portion 34 is lowered, resulting in an increase in the opening torque of the cover 31. At the same time, the sealing of the cover 31 is lowered. Further, when the depth E exceeds the above range, the strength of the inner wall portion 34 of the thin portion 35 is not fully achieved, and the inner seal portion 34 is deformed when the inner seal portion 34 is fitted into the opening portion of the container (bottom portion). Bending deformation, etc.), thereby reducing its sealing. While the thinned concave portion 34a is formed, the lower portion of the inner side seal portion 34 protrudes outward from the vicinity of the base end portion, and the contact convex portion 34b is formed to come into contact with the inner wall of the container opening portion when the cover is attached. The contact convex portion 34b having a cross-sectional shape slightly curved in the inner seal portion 34 can have a preferable sealing property. Further, the maximum outer diameter of the inner seal portion 34 may be approximately equal to the inner diameter of the opening portion of the cover 12 to be mounted, preferably set to be slightly larger than the inner diameter of the opening portion of the container. An annular outer seal portion 42 that protrudes downward is formed on the outer peripheral side of the top plate portion of the inner seal portion 34. The outer seal portion 42 is formed to come into contact with the outer peripheral surface of the container opening when the cover is attached. The constituent material of the lid 31 is preferably polypropylene or high density polyethylene. Next, a method of manufacturing the above-described cover 31 and a manufacturing apparatus thereof will be described. Fig. 3 is a cross-sectional view showing a manufacturing apparatus for a synthetic resin cover according to a preferred embodiment of the present invention. The manufacturing apparatus 1 shown here is a cover 31 for manufacturing a projecting annular inner seal portion 34 formed on the inner surface of the top plate portion 32. The structure of the manufacturing apparatus 1 has an inner surface side for forming the cover 31. The inner side mold 2, the outer side mold 3 for forming the outer surface side of the lid 31, and the end side mold 4 for forming the end portion of the lid 31. The outer side mold 3 is formed into a bottomed cylindrical joint structure having an inner surface shape which is shaped to conform to the outer shape of the cover 31. The inner surface side mold 2 has an inner surface side mold main body 5 and an outer cylinder member 6 provided on the outer circumference of the main body 5. The inner surface side mold body 5 has a bearing 8 and a cylindrical head portion 9 provided at the front end of the bearing 8 (at the lower end of Fig. 3). The outer diameter of the top cover portion 9 is formed to be larger than the outer diameter of the bearing 8, and has an outer shape along the inner surface of the inner seal portion 34 of the cover 31. The outer tubular member 6 is formed into a tubular structure having an outer shape that cuts a portion other than the inner seal portion 34 of the top plate portion 32 and the inner surface of the tubular portion 33. A bearing insertion portion 1A of the insertable bearing 8 and a top cover portion accommodating portion 11 for accommodating the top cover portion 9 are formed inside. The top cover portion accommodating portion 11 is formed to have a length in the axial direction (up-and-down direction) that is at least longer than the axial direction of the top cover portion 9, and an inner surface shape is formed on the inner surface of the lower end portion at all 13 1250122 7641 pif 1 week. The inner seal portion that cuts the outer shape of the inner seal portion 34 forms a notch 12 ◦. The inner seal portion forms the inner wall of the lower portion of the notch 12, and the thinned concave portion that forms the protrusion along the thinned recess portion 34a forms the shape of the convex portion 12a. Therefore, the thinned recess forming projection 12a has an inner diameter which is at least smaller than the maximum outer diameter of the inner seal portion 34. In the preferred embodiment, the outer cylinder member 6 and the inner surface side mold body 5 are relatively movable in the axial direction (i.e., in the upper and lower directions shown in Fig. 3). φ In the preferred embodiment, the outer cylinder member 6 is movable in the upper and lower directions with respect to the inner surface side mold body 5. Further, in the present invention, the inner-side mold body 5 can be moved in the vertical direction with respect to the outer tubular member 6. Hereinafter, the solid line shown in Fig. 3 is a state in which the outer tubular member 6 is retracted (moved upward) with respect to the main body 5 so that the main body 5 is located below the opposite side, and the shape of the cover 31 is along the inner surface. A gap between the side mold 2 and the outer side mold 3 is formed, and at this time, the position of the inner surface side mold body 5 is "lower position". Further, the two-point line (D1V1de line) is a state in which the outer tube member 6 is advanced (moved downward) with respect to the body 5, and the position of the inner-side mold body 5 is "upward position". When the inner-side mold body 5 is in the raised position, the outer periphery of the lower end of the top cover portion 9 is located near the front end of the inner seal portion 34, and the elastic deformation of the inner seal portion 34 is designed to be applied in the radial direction on the inner seal portion 34. The force of the square is such that the protruding end 34c of the inner seal portion 34 moves inward. The end jaw side mold 4 is formed into a tubular shape, and the cylindrical member insertion portion 1 3 is inserted into the outer cylinder member 6 outside the inside. The shape of the lower end of the end side mold 4 is formed along the end portion of the TE ring portion 39 14 1250122 7641 pif 1 (at the upper end portion of Fig. 3) and the ear protector 41. The end side mold 4 is movable in the axial direction (up and down direction) with respect to the inner surface side mold, and as shown in Fig. 5, the tubular member 4a is disposed on the outer periphery of the end side mold 4. The molding space 14 is constituted by a gap formed between the inner surface side mold 2 (when the inner surface side mold body 5 is at the lower position), the outer side mold 3, and the end side mold 4 $, and the cover 31 The shape is formed along the forming space 14. Next, a case where the above-described cover 31 is manufactured by the above-described manufacturing apparatus 1 will be taken as an example, and a method of manufacturing a synthetic resin cover will be described with reference to a preferred embodiment of the present invention. Referring to Fig. 3, in the molding space 14 formed by the inner surface side mold 2, the outer side mold 3, and the end side mold 4, a synthetic resin tree material (polypropylene, polyethylene, etc.) is filled. Forming. At this time, the relative position of the outer cylinder member 6 and the inner surface side mold main body 5 is such that the inner surface side mold main body 5 is fixedly disposed at a lower position. The inner seal portion of the inner surface of the outer cylinder member 6 is formed with a synthetic resin material in a gap between the notch 12 and the top cover portion 9 to form an inner seal portion 34. The forming method of the lid 31 is preferably a compression molding method. Hereinafter, the process of taking out the lid 31 from the inner surface side mold 2 and the outer surface side mold 3 will be described in detail. First, as shown in FIGS. 4 and 5, the lid 31 is taken out from the outer side mold 3, and the inner side mold 2 is moved downward, that is, the inner side mold main body 5 is along the inner side seal portion. The protruding direction of 34 is moved so that the inner-side mold body 5 is placed at the raised position. At the ascending position, the outer periphery of the lower end of the top cover portion 9 is located near the upper end of the inner seal portion 34 15 1250122 7641 pif 1 , and the projecting end 34c of the inner seal portion 34 is in a state of being movable inward in the radial direction. Further, the end side mold 4 is raised with respect to the inner surface side mold 2 to be separated from the TE ring portion 39 and the ear protectors. Next, as shown in Fig. 6, all of the inner surface side molds 2 (the inner surface side mold main body 5 and the outer cylinder member 6) are moved upward relative to the lid 31. A thinned concave portion forming convex portion 12a having an inner diameter at least smaller than the maximum outer diameter of the inner seal portion 34 is formed on the inner circumference of the inner seal portion forming notch 12, and is thinned when the main body 5 and the outer tubular member 6 are moved upward. The concave portion forming convex portion 12a applies an upward force to the inner seal portion 34 (the thinned concave portion 34a lower edge portion 34f). Referring to Fig. 7, at this time, the inner seal portion 34 is elastically deformed so that the vicinity of the front end portion of the inner seal portion 34 moves inward, and the outer diameter of the inner seal portion 34 is reduced. Thus, the thinned concave portion forming the convex portion 12a allows the contact convex portion 34b of the inner seal portion 34 to pass smoothly. Therefore, when the inner surface side mold 2 is pulled out, the thinned concave portion forming convex portion 12a exerts an appropriate force on the inner side seal portion 34. Further, in this process, the outer cylinder member also applies an upward force to the ear protector 41, and the end side mold 4 has been separated from the TE ring portion 39 and the ear protector 41, and the ear protector 41 is elastically folded upward. The state of deformation. Therefore, the outer cylinder member 6 does not exert an excessive force on the ear protector 41 when the inner surface side mold 2 is pulled out. After the above-described drawing process, the inner side mold is taken out by the lid 31 as shown in Fig. 8, and the finished lid 31 is obtained. The lid 31 is rotated in the container opening 邰 toward the occluding direction ‘ by the insect entanglement of the 盍 31 and the male screw of the container opening, so that the lid 31 is attached to the container opening 16 1250122 7641 pif 1 . At this time, the inner seal portion 34 is fitted into the inside of the container opening portion, and the contact convex portion 34b is brought into contact with the inner wall of the container opening portion without gap contact to seal the container opening portion. When the plug is opened, the cover 31 is rotated in the opening direction, the rise of the Te ring portion 39 is blocked, and the main body 38 continues to rise, so that the TE ring portion 39 is separated from the main body 38 by the cutting of the bridge portion 37, that is, The inner seal portion 34 can be pulled out of the container opening to release the seal. The cover 31 of the preferred embodiment has a top plate portion 32 and a cylindrical portion 33' suspended from the periphery thereof, and an annular inner seal portion 34 is formed on the inner surface of the top plate portion 32, and is formed at the base end of the inner seal portion 34. A thin portion 35 which is thinner than the other portions is formed in the vicinity, and the tortuous rigidity of the inner seal portion 34 of this portion is set to be low, so that the inner seal portion 34 has complete flexibility. Therefore, when the cover 31 is attached to the opening of the container, the inner seal portion 34 can easily correspond to the inner surface shape of the opening portion of the container, and is bent and deformed by the thin portion 35 to press the container opening with a certain pressure in the peripheral direction. The inner faces of the parts are in contact. For example, when one portion of the container opening 形成 in the peripheral direction is formed thinner than the other portions, the vicinity of the front end of the inner seal portion 34 is changed toward the thin-walled portion of the container opening portion by the bending deformation of the thin portion 35. . Therefore, the pressing force corresponding to the inner surface of the inner portion of the inner sealing portion 34 of the thin portion is stable, and at the same time, the pressure drop corresponding to the portion other than the thin portion can be suppressed. The inner seal portion 34 can be brought into contact with the inner surface of the opening portion of the container at a constant pressure throughout the circumference. In this way, even in the case of the container having the dimensional variability, it is possible to prevent the opening of the opening pressure of the 17 1250122 7641 pif 1 due to the excessive pressure of the inner surface of the opening portion of the inner sealing portion 34, thereby opening the plug. The torque is maintained at the set threshold. Further, the pressing force corresponding to the inner surface of the container opening portion of the inner seal portion 34 is prevented from becoming unstable, and the sealing property corresponding to the container opening portion of the inner seal portion 34 can be improved, and the sealing performance of the lid 31 can be improved. Further, the thin portion 35 is formed to form a thinned concave portion 34a on the outer circumference of the inner seal portion 34, and a contact convex portion that protrudes outward from the vicinity of the proximal end portion is formed in the lower portion (near the front end portion) of the inner seal portion 34. 34b. Therefore, when the cover 31 is mounted, the lower portion of the inner seal portion 34 (near the front end portion) can seal the container opening portion, and when the lid 31 is opened, the sealing state of the φ container can be delayed, thereby improving the damage. . The manufacturing method of the above preferred embodiment is such that the inner surface side mold 2 is pulled out from the formed cover 31, and the outer tube member 6 and the inner surface side mold body 5 reach the protruding end 34c of the inner side seal portion 34 toward the inner side. After the position of the square movement, the inner side mold 2 can be pulled out by the cover 31. In the process of pulling out, the thinned concave portion forming convex portion 12a formed at the notch 12 applies an upward force to the inner seal portion 34, and at this time, the vicinity of the front end portion of the inner seal portion 34 moves inward, thereby The outer diameter of the inner seal portion 34 is reduced. Therefore, the thinned concave portion forming convex portion 12a having an inner diameter smaller than the maximum outer diameter of the inner seal portion 34 is formed on the outer tubular member 6, and the inner surface seal portion 34 can be formed when the inner surface side mold 2 is pulled out. Apply appropriate force to pull out smoothly. Therefore, it is possible to prevent the occurrence of a phenomenon such as formation of an abnormal protruding portion such as a concave portion, breakage of a crack or the like, stretching deformation, or breakage in the inner seal portion 34. Therefore, it is possible to prevent deformation of the inner seal portion 34 (for example, formation of an abnormal protruding portion) due to excessive partial pressing force of the inner seal portion 34 corresponding to the inner surface of the opening portion of the container, so that the opening torque is maintained at the set After that. 18 1250122 7641 pif 1 Moreover, when the dimensional precision of the inner seal portion 34 is increased, it is possible to prevent the inner seal portion 34 from being deformed or damaged (for example, cracked) between the inner seal portion 34 and the inner surface of the container opening portion. The gap, which in turn, results in a cover 31 having excellent sealing properties. In the manufacturing apparatus 1 of the above-described embodiment, the inner surface side mold 2 includes an inner surface side mold body 5 having a top cover portion 9 that cuts the inner surface shape of the inner seal portion 34, and an inner surface shape that fits the inner seal. The outer portion of the portion 34 has a shape other than the tubular member 6. And the outer cylinder member 6 and the inner surface side mold main body 5 can be relatively moved in the up and down direction along the protruding direction of the inner side seal portion 34 to pull the inner side mold 2 out of the formed cover 31 as the outer cylinder After the member 6 and the inner-side mold main body 5 are located at positions where the protruding end 34c of the inner seal portion 34 is movable inward, the inner-side mold 2 can be pulled out from the lid 31. Therefore, the inner surface side mold 2 can be smoothly pulled out without applying an excessive force to the inner side seal portion 34, and formation of an abnormal protruding portion such as a concave portion or a breakage such as a crack in the inner seal portion 34 can be prevented. , stretching deformation, fracture and other phenomena. Therefore, deformation or breakage of the inner seal portion 34 due to excessive partial pressing force of the inner seal portion 34 corresponding to the inner surface of the opening portion of the container can be prevented, and generation between the inner seal portion 34 and the inner surface of the container opening portion can be prevented. The gap is such that the opening torque can be maintained at the set threshold and the sealing performance is improved. In the present invention, the thinned concave portion formed in the inner seal portion disclosed in the above embodiment is not limited. For example, the thinned concave portion as shown by the symbol 44a in Fig. 9 is formed to have a certain inclination angle. Lower edge portion 44f. Further, as shown in the reference numeral 54a of Fig. 10, the thinned concave portion may have a cross-sectional shape which is curved inwardly. Further, in the above embodiment, the thin portion of the inner seal portion is formed to be thinned, and the recess portion is not limited thereto. As shown in Fig. 11, the thinned concave portion 64a formed on the inner circumference of the inner end portion of the inner side seal portion 34 may be added to the structure of the lid 31. Further, reference numerals 45, 55, and 65 in Figs. 9 to 11 denote thin-walled portions. Further, in the present invention, the formation position of the thinned concave portion may be formed on the inner circumference of the inner seal portion. INDUSTRIAL APPLICABILITY The synthetic resin cover of the present invention has a top plate portion and a tubular portion that is suspended from the periphery thereof, and an annular inner seal portion that protrudes on the inner surface of the top plate portion, and φ is formed on the inner seal portion. A thin portion which is thinner than the other portions is formed near the end, and the tortuous rigidity of the inner seal portion of this portion is set to be low, so that the inner seal portion has complete flexibility. Therefore, when the lid is attached to the opening of the container, the inner seal portion can be easily bent and deformed in accordance with the shape of the inner surface of the opening portion of the container, and can be brought into contact with the inner surface of the opening portion of the container at a constant pressing force in the peripheral direction. Therefore, even in the case of a container having dimensional variability, it is possible to prevent the local pressing force corresponding to the inner surface of the opening portion of the inner sealing portion from being excessively large, and to make the profitable beach red. * It also prevents gaps between the inner seal and the container opening to improve the sealing performance. Further, in the method for producing a synthetic resin cap according to the present invention, the inner surface side mold is pulled out by the formed lid, and the protruding end of the outer tube member and the inner surface side mold body reaching the inner side seal portion is movable inwardly. After the position, the inner side mold can be pulled out by the cover, and the inner side mold can be smoothly pulled out without applying excessive force to the inner seal portion. Therefore, it is possible to prevent the occurrence of breakage, stretch deformation, breakage, and the like in the formation of the abnormal protrusions 20 1250122 7641 pif 1 such as the concave portion or the like in the inner seal portion. Therefore, it is possible to prevent deformation or breakage of the inner seal portion due to excessive partial pressing force of the inner seal portion corresponding to the inner surface of the opening portion of the container, and to prevent a gap from being formed between the inner seal portion and the inner surface of the container opening portion. The opening torque can be maintained at the set threshold and the sealing performance is improved.

twenty one

Claims (1)

1250122 7641pif3 is the 9th 1115j2 Chinese patent without a g-line correction. This revision date: November, 1994, the date of application, the patent scope: L. A synthetic resin cover with a top plate ( And a tubular portion (33) suspended from a periphery of the top plate portion, wherein an inner sealing portion (34) which is protruded into the annular opening of the container is formed on the inner surface of the top plate portion (32). And forming a thin portion (35) thinner than the other portions near the base end of the inner seal portion (34), and forming a semicircle in a ring shape on the outer peripheral side of the base end portion of the inner seal portion (34). Protrusion (34g). 2. The synthetic resin cover according to claim 1, wherein the thin portion (35) is formed on an outer circumference of the inner seal portion (34), and a thin portion (35) is formed in the thin portion (35). The recessed portion (34a) is thinned. A manufacturing method of a synthetic resin cover for manufacturing a cylindrical portion (33) having a top plate portion (32) and hanging from a periphery of the top plate portion, and being inside the top plate portion (32) Forming a protruding inner annular seal portion (34), and forming a thin portion (35) thinner than the other portions near the base end of the inner seal portion (34), and digging the seal portion (34) on the inner side Further, the outer peripheral side of the base end portion is formed by a synthetic resin cover having a semicircular portion (34 g) formed in a semicircular shape, and the manufacturing method uses a shape to fit the inner surface shape of the cover. An inner side mold (2) and an outer side mold (3) shaped to fit the outer shape of the cover, and a cylindrical member for stopping the tube portion (33), the manufacturing method is characterized in that The inner surface side mold (2) is provided with an inner surface side having a shape that matches the inner surface shape of the inner side seal portion (34), and a shape (5) and a shape that matches the outer shape of the inner side seal portion (34). An outer cylinder member (6), and the outer cylinder member (6) and the inner surface side mold body (5) are closely aligned along the side of the side (34) The protruding direction is that the relative movement is possible, and a synthetic resin phase is accumulated in the gap between the inner (1) mold (2) and the outer side mold (3). After forming, the inner side mold is pulled out from the formed cover, and (2) 'the outer tube member (6) and the inner side mold body (5) are located at the inner side 22 1250122 7641pif3 f After the protruding end (3k) of the portion (34) is moved inwardly, the end portion of the cylindrical portion (33) is stopped by the cylindrical member (4a) to pull out the inner-side mold (2) Red 4·~ a synthetic resin cap manufacturing device for manufacturing a cylindrical portion (33) having a top plate portion G2) and hanging from the periphery of the top plate portion, and in the top plate portion (32A_Sheng a torus--seal portion (34), and a thin portion (35) thinner than the other portions near the base end of the inner seal portion (34), and the base of the inner seal portion (34) Further, the synthetic resin cap manufacturing apparatus of the synthetic resin cap manufacturing apparatus is provided in a synthetic resin cap made of a semi-circular convex d (34 g) in a ring shape on the outer peripheral side of the end portion. An inner surface side mold (2) having an inner surface shape of the cover and an outer side mold (3) having a shape that matches the outer surface of the cover, the synthetic resin cover manufacturing apparatus characterized in that the inner surface side mold is provided An inner-side mold body (5) having a shape that matches an inner surface shape of the inner seal portion, and an outer cylinder member (6) having a shape that conforms to an outer surface shape of the inner seal portion (34), and the outer cylinder member (6) And the inner-side mold main body (5) and the tubular member (4a) are relatively movable along the protruding direction of the inner dense portion.
23 1250122 7641 pif 1 is the no-line correction page of No. 90111532
Figure 2
TW90111532A 2000-05-18 2001-05-15 Synthetic resin cap, and method and device for manufacturing the synthetic resin cap TWI250122B (en)

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Publication number Priority date Publication date Assignee Title
JP3639285B2 (en) * 2003-09-19 2005-04-20 株式会社アルコア・クロージャー・システムズ Synthetic resin caps, closure devices, and container-packed beverages
DE602005009213D1 (en) * 2004-09-01 2008-10-02 Creanova Universal Closures Sealant for closure, closure and procedure
JP4779411B2 (en) * 2005-04-11 2011-09-28 凸版印刷株式会社 Sealed container
AT556953T (en) * 2008-07-08 2012-05-15 Crown Cork Japan CONTAINER COVER made of synthetic resin
CN102040038B (en) * 2010-12-01 2013-03-27 陈泰宇 Bottle cap
WO2012095501A1 (en) 2011-01-14 2012-07-19 Creanova Universal Closures Ltd. Closure
CN103303556A (en) * 2012-03-14 2013-09-18 曼盛包装(上海)有限公司 Flip cover structure capable of regulating opening force
SG11201610573SA (en) * 2014-06-20 2017-02-27 Suntory Holdings Ltd Resin cap
SG11201610616WA (en) * 2014-06-26 2017-01-27 Suntory Holdings Ltd Resin cap
WO2018117437A1 (en) * 2016-12-22 2018-06-28 (주)씨앤지 Compressed gas supply device
US10532858B2 (en) 2017-09-06 2020-01-14 Creanova Universal Closures Ltd. Closure for container neck finishes

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Publication number Priority date Publication date Assignee Title
JPS5746289Y2 (en) * 1979-01-08 1982-10-12
JPS60500286A (en) * 1983-01-07 1985-03-07
JPH09156656A (en) * 1995-12-05 1997-06-17 Shibasaki Seisakusho:Kk Sealing means, cap made of synthetic resin and container
JPH11278511A (en) * 1998-03-26 1999-10-12 Hokkai Can Co Ltd Bottle main body

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KR20030015244A (en) 2003-02-20

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