TWI753948B

TWI753948B - Cover body, mold and method of making cover body

Info

Publication number: TWI753948B
Application number: TW106133056A
Authority: TW
Inventors: 荒木英司; 河田崇; 高木健司
Original assignee: 日商大和製罐股份有限公司
Priority date: 2017-09-27
Filing date: 2017-09-27
Publication date: 2022-02-01
Also published as: TW201914914A

Abstract

蓋體(1)係具備蓋體主體(11)及圓板狀的密封構件(12)，蓋體主體(11)，係具有頂板部(21)、及透過角部(23)而與頂板部(21)設置成一體之裙部(22)，且被螺合於罐容器(100)的口部(110)；密封構件(12)，係設置成與蓋體主體(11)為不同個體且與頂板部(21)相對向，並具有滑動層(41)及密封層(42)，滑動層(41)，係在比當蓋體主體(11)與罐容器(100)螺合時與口部(110)相對向的部位更外周側形成有突起部(41c)，且是與頂板部(21)進行滑動，突起部(41c)是朝向外周緣其厚度逐漸變薄；密封層(42)，係與滑動層(41)設置成一體且用於密封口部(110)。A cover body (1) is provided with a cover body main body (11) and a disc-shaped sealing member (12), and the cover body main body (11) has a top plate portion (21) and a penetrating corner portion (23) which is connected to the top plate portion. (21) An integral skirt (22) is screwed to the mouth (110) of the tank container (100); the sealing member (12) is provided as a separate body from the cover body (11) and Opposite to the top plate portion (21), and have a sliding layer (41) and a sealing layer (42), the sliding layer (41) is tied to the opening when the cover body (11) is screwed with the tank container (100). A protruding part (41c) is formed on the outer peripheral side of the part facing the part (110), which slides with the top plate part (21), and the thickness of the protruding part (41c) gradually decreases toward the outer periphery; the sealing layer (42) , which is integrated with the sliding layer (41) and used to seal the mouth (110).

Description

蓋體、模具以及蓋體之製造方法Cover body, mold and method of making cover body

[0001] 本發明是關於用於封閉罐容器之蓋體、模具以及蓋體之製造方法。[0001] The present invention relates to a cover body, a mold, and a method for manufacturing the cover body for sealing a can container.

[0002] 以往，用於密封罐容器的口部之蓋體所採用的構造，係在蓋體主體的內表面設置由與口部密合的樹脂材料所構成之密封構件。此外，這種蓋體，為了將蓋體開瓶時的開瓶扭矩降低，使蓋體主體和密封構件成為非接合狀態的技術是已知的(例如，參照日本特開2004-217295號公報)。　　[0003] 在日本特開2004-217295號公報揭示出，成為密封構件之襯墊(liner)係具有：與蓋體主體的頂面部相對向之支承層、及與容器的口部密合之機能層。此外，在日本特開2004-217295號公報出，藉由共擠製成形將支承層及機能層以接合狀態積層為積層薄片材，並將積層薄片材裁切成既定的形狀而形成襯墊。[0002] Conventionally, a lid body for sealing the mouth of a can container has a structure in which a sealing member made of a resin material that is in close contact with the mouth is provided on the inner surface of the lid body. In addition, in order to reduce the opening torque of the cap body when the cap body is opened, there is known a technique of bringing the cap body main body and the sealing member into a non-engaged state (for example, refer to Japanese Patent Laid-Open No. 2004-217295). . In Japanese Patent Laid-Open No. 2004-217295, it is disclosed that a liner serving as a sealing member has a support layer facing the top surface of the lid body and a function of being in close contact with the mouth of the container. Floor. In addition, Japanese Patent Laid-Open No. 2004-217295 discloses that a support layer and a functional layer are laminated in a bonded state to form a laminated sheet by co-extrusion, and the laminated sheet is cut into a predetermined shape to form a spacer.

[發明所欲解決之問題] 　　[0004] 上述密封構件存在以下的問題。亦即，依上述方法製造密封構件的情況，必須使用從積層薄片材將襯墊裁切的設備以及將裁切後的襯墊予以搬運的設備。此外，裁切出襯墊後的積層薄片材成為廢棄品，而有良率不佳的問題。　　[0005] 例如可考慮，對蓋體主體內供給熔融狀態的樹脂材料，利用模具以成為既定密封構件的形狀的方式將樹脂材料成形的方法。然而，當在蓋體主體內將密封構件成形的情況，縱使將支承層以與蓋體主體的內徑相同的方式進行成形，因為在成形後原先成形的支承層會收縮，而在蓋體主體和支承層之間會產生間隙。之後，當從支承層的上方將機能層進行成形時，構成機能層之樹脂有越過支承層而進入蓋體主體和支承層間的間隙之疑慮。　　[0006] 用於密封瓶罐口之機能層，因為比支承層軟，當進入到該間隙之機能層與蓋體主體接觸時，會有開瓶扭矩增加之問題。　　[0007] 於是，本發明的目的是為了提供可將開瓶扭矩降低之蓋體、模具以及蓋體之製造方法。 [解決問題之技術手段] 　　[0008] 為了達成將前述問題予以解決的目的，本發明的蓋體、模具以及蓋體之製造方法是如下述般構成。　　[0009] 作為本發明的一態樣，蓋體係具備蓋體主體及圓板狀的密封構件，前述蓋體主體，係具有頂板部、及透過呈圓環且曲面狀的角部而與前述頂板部設置成一體之裙部，且被螺合於罐容器的口部；前述密封構件，係設置成與前述蓋體主體為不同個體且與前述頂板部相對向，並具有滑動層及密封層，前述滑動層，係在比當前述蓋體主體與前述罐容器螺合時與前述口部相對向的部位更外周側形成有突起部，且是與前述頂板部進行滑動，前述突起部是朝向外周緣其厚度逐漸變薄；前述密封層，係與前述滑動層設置成一體且用於密封前述口部。　　[0010] 作為本發明的一態樣，模具係具備下模具、第1上模具及第2上模具，前述下模具係具有凹部，前述凹部是與構成蓋體主體之成形品之頂板部的外形及呈圓環且曲面狀的角部之至少一部分的外形形成為相同形狀，前述蓋體主體係具有前述頂板部及透過前述角部而與前述頂板部設置成一體的裙部；前述第1上模具，係具有與前述裙部的內徑相同之外徑且在端面和外周面之稜部具有平面的去角部，係用於成形設置成與前述蓋體主體為不同個體之密封構件的滑動層，前述第2上模具，係具有與前述裙部的內徑相同的外徑且端面與前述下模具相對向，係用於成形前述密封構件之密封層。　　[0011] 作為本發明的一態樣，蓋體之製造方法，係在下模具的凹部配置構成蓋體主體之成形品，前述蓋體主體係具有頂板部、及透過呈圓環且曲面狀的角部而與前述頂板部設置成一體的裙部，前述凹部是與前述成形品之前述頂板部的外形及前述角部之至少一部分的外形形成為相同形狀；對前述頂板部供給第1樹脂材料，藉由第1上模具將前述第1樹脂材料進行成形，而構成設置成與前述蓋體主體為不同個體之密封構件的滑動層，前述第1上模具係具有與前述裙部的內徑相同的外徑且在端面和外周面之稜部具有平面的去角部；對前述滑動層供給第2樹脂材料，藉由第2上模具將前述第2樹脂材料進行成形而在前述滑動層上構成密封層，前述第2上模具係具有與前述裙部的內徑相同的外徑且端面與前述下模具相對向。　　[0012] 依據本發明，能夠提供可將開瓶扭矩降低之蓋體、蓋體之製造方法及模具。[Problems to be Solved by the Invention] [0004] The above-described sealing member has the following problems. That is, in the case of manufacturing the sealing member according to the above method, it is necessary to use equipment for cutting the gasket from the laminated sheet and equipment for conveying the slitted gasket. In addition, the laminated sheet after cutting out the spacer becomes waste and has a problem of poor yield. [0005] For example, it is conceivable to supply the resin material in the molten state into the lid body main body, and to use a mold to form the resin material so as to have a predetermined shape of the sealing member. However, when the sealing member is formed in the lid body, even if the supporting layer is formed in the same manner as the inner diameter of the lid body, since the previously formed supporting layer shrinks after the forming, and the supporting layer is formed in the lid body There will be a gap between it and the support layer. Then, when the functional layer is formed from above the support layer, the resin constituting the functional layer may pass over the support layer and enter the gap between the lid body and the support layer. [0006] The functional layer used for sealing the mouth of the bottle is softer than the support layer. When the functional layer entering the gap is in contact with the main body of the cover, there will be a problem of increased bottle-opening torque. [0007] Therefore, the object of the present invention is to provide a cap body, a mould and a manufacturing method of the cap body that can reduce the bottle opening torque. [Technical means for solving the problem] [0008] In order to achieve the purpose of solving the above-mentioned problems, the cover body, the mold and the manufacturing method of the cover body of the present invention are constructed as follows. As an aspect of the present invention, the lid system includes a lid body and a disc-shaped sealing member, and the lid body has a top plate portion and a corner portion that is annular and curved to be connected to the top plate. The said sealing member is set to be a different body from the said cover body and is opposite to the said top plate part, and has a sliding layer and a sealing layer, The sliding layer has a protruding portion formed on the outer peripheral side of the portion facing the mouth portion when the lid body is screwed to the can container, and slides with the top plate portion, and the protruding portion faces the outer periphery. The thickness of the edge gradually becomes thinner; the sealing layer is integrated with the sliding layer and is used to seal the mouth. As an aspect of the present invention, the mold is provided with a lower mold, a first upper mold, and a second upper mold, the lower mold is provided with a concave portion, and the concave portion is the outer shape of the top plate portion of the molded product constituting the cover body. and the outer shape of at least a part of the corner portion which is circular and curved is formed in the same shape, and the cover main body has the top plate portion and the skirt portion integrated with the top plate portion through the corner portion; the first upper The mold has the same outer diameter as the inner diameter of the skirt and has a flat chamfered portion at the edge of the end surface and the outer peripheral surface. The layer, the second upper mold, has the same outer diameter as the inner diameter of the skirt, and the end face is opposite to the lower mold, and is used for forming the sealing layer of the sealing member. As an aspect of the present invention, the manufacturing method of the cover body is arranged in the concave part of the lower mold to configure the molded product of the cover body main body, and the cover body main body system has a top plate part and through a circular and curved corner. a skirt part integrally provided with the top plate part, the recessed part is formed in the same shape as the outer shape of the top plate part of the molded product and the outer shape of at least a part of the corner part; the first resin material is supplied to the top plate part, The first upper mold is used to mold the first resin material to form a sliding layer provided as a sealing member different from the cover main body, and the first upper mold has the same inner diameter as the skirt. The outer diameter has a flat chamfered portion at the edge portion of the end surface and the outer peripheral surface; the second resin material is supplied to the sliding layer, and the second resin material is molded by the second upper mold to form a seal on the sliding layer. layer, the second upper mold has the same outer diameter as the inner diameter of the skirt, and the end face is opposite to the lower mold. [0012] According to the present invention, it is possible to provide a cap body, a manufacturing method of the cap body, and a mold that can reduce the bottle opening torque.

[0014] 以下，針對本發明的第1實施形態之蓋體1的構造、蓋體1之製造方法及用於蓋體1的製造之模具200，使用圖1至圖8做說明。　　[0015] 圖1係將本發明的第1實施形態之罐容器100用的蓋體1之構造以局部剖面示意顯示之側視圖。圖2係將蓋體1之構造以局部剖面示意顯示之側視圖。圖3係顯示蓋體1之製造方法的第1製程之一製程及模具200的構造之說明圖。圖4係顯示蓋體1之製造方法的第1製程之其他製程的說明圖。圖5係顯示蓋體1之製造方法的第2製程之一製程之模具200的構造之說明圖。圖6係顯示蓋體1之製造方法的第2製程之其他製程的說明圖。圖7係將在蓋體1的第1製程之密封構件12之滑動層41的構造示意顯示之剖面圖。圖8係將在蓋體1的第2製程之密封構件12之滑動層41及密封層42的構造示意顯示之剖面圖。在圖1及圖2中，為了說明方便，蓋體1之剖面構造僅顯示剖面部，而省略側面視的構造。　　[0016] 如圖1所示般，蓋體1構成為，以被蓋於罐容器100之口部110的狀態進行捲封(seaming)固定，而能將口部110密封。　　[0017] 在此，罐容器100是收容飲料等的所謂瓶罐(bottle)型容器。例如，罐容器100是由在兩面積層有樹脂製薄膜之鋁合金、或表面處理鋼板等的金屬材料所構成。罐容器100形成為，一方的端部被縮徑而具有不同外徑的圓筒狀。罐容器100，係在一方的端部具有用於將所收容的飲料排出之口部110。在口部110的外周面，從罐容器100之底面側朝向端部係依序具有：顎部111、外螺紋部112及捲曲部113。　　[0018] 顎部111是構成為呈環狀突出。捲曲部113形成為比外螺紋部112小徑。此外，捲曲部113構成為比蓋體1的內徑小。捲曲部113是將口部110之端部折疊1次以上而構成。捲曲部113係構成用於將罐容器100內所收納的飲料排出之開口部。　　[0019] 蓋體1係具備：蓋體主體11、及以不同個體的方式設置於蓋體主體11內之密封構件12。　　[0020] 蓋體主體11是由在鋁合金等的金屬材料上形成有樹脂被膜層之材料所構成。蓋體主體11，是將薄平板狀的該材料進行杯狀引伸(drawing)成形、滾紋(knurling)成形及滾壓(roll-on)成形等的各成形而構成。　　[0021] 蓋體主體11係具備：圓板狀的頂板部21、以及在頂板部21的周緣部設置成一體之圓筒狀的裙部22。蓋體主體11之頂板部21和裙部22，是藉由呈圓環且曲面狀的角部23而構成為呈一體地連續。　　[0022] 頂板部21是構成為圓板狀，其主面構成為平面。裙部22，其一端是透過角部23而與頂板部21形成連續，另一端開口。裙部22，是從頂板部21側的端部到開口的端部具備有：設有通氣孔(vent slit)31a之複數個滾紋部31、內螺紋部32及篡改易顯(tamper-evident)帶部33。　　[0023] 滾紋部31、內螺紋部32及篡改易顯帶部33，是將頂板部21、尚未成形出滾紋部31、內螺紋部32及篡改易顯帶部33之圓筒狀的裙部22、及角部23所構成之杯狀的成形品99，藉由滾紋成形、滾壓成形等的加工而形成。　　[0024] 滾紋部31，係具有通氣孔31a且是從裙部22的內周面突出。內螺紋部32構成為可與罐容器100之外螺紋部112螺合。篡改易顯帶部33是在蓋體1從罐容器100離開的方向、且蓋體1的軸方向上，與罐容器100之顎部111卡合。此外，篡改易顯帶部33係具有：當蓋體1開封時會斷裂而用於從裙部22脫離之斷裂部33a。　　[0025] 密封構件12構成為與蓋體主體11為不同個體。密封構件12構成為，其外徑比設置於蓋體主體11的裙部22之滾紋部31的內切圓的直徑更大之圓板狀。密封構件12，是與從裙部22的內周面朝徑方向突出之滾紋部31的通氣孔31a在蓋體主體11的軸方向卡合，藉此與蓋體主體11設置成一體。　　[0026] 密封構件12係具備：圓板狀的滑動層41、及一體地積層於滑動層41之圓板狀的密封層42。密封構件12，是使用不同樹脂材料將滑動層41及密封層42一體成形而構成。密封構件12係具備：厚度均一的平板部12a、及頂板部21側之外周緣的外表面由曲面所構成之曲面部12b。換言之，密封構件12是形成為圓板狀，且頂板部21側的稜部是由既定曲率的曲面所構成。　　[0027] 滑動層41是由相對地硬度較高(硬)的樹脂材料所構成。此外，滑動層41是由與蓋體主體11之樹脂被膜層不具備接合性及黏著性之樹脂材料所構成。亦即，滑動層41構成為，在與頂板部21成為非接合狀態且與頂板部21接觸的狀態下，可在頂板部21滑動。　　[0028] 滑動層41所使用的樹脂材料可列舉：聚丙烯樹脂、聚乙烯樹脂等的烯烴系樹脂，聚對苯二甲酸乙二酯等的聚酯系樹脂、苯乙烯系樹脂、丙烯酸系樹脂等。在本實施形態中，滑動層41是例如由聚丙烯樹脂所構成。在滑動層41所使用之樹脂材料中，可適宜地添加顏料、潤滑劑、軟化劑等。　　[0029] 滑動層41係設置成與蓋體主體11之頂板部21相對向且與蓋體主體11為不同個體。滑動層41，藉由所採用的樹脂材料而構成為可與蓋體主體11的頂板部21進行滑動。滑動層41構成為圓板狀。滑動層41的外徑構成為，比裙部22的內徑更小徑，與滾紋部31之內切圓為大致同一直徑或比該內切圓稍小徑，且比口部110之捲曲部113的外徑更大徑。　　[0030] 滑動層41係具備：厚度均一之第1平板部41a、頂板部21側之外周緣的外表面是由曲面所構成之第1曲面部41b、以及設置於第1曲面部41b的密封層42側之突起部41c。第1平板部41a構成為，從滑動層41的中心到比與口部110之捲曲部113相對向的部位更外周側的部分之厚度均一。　　[0031] 第1曲面部41b，從比與口部110之捲曲部113相對向的部位更外周側到外周緣的部分之厚度構成為，朝向外周緣使厚度逐漸減少。突起部41c構成為，相對於滑動層41的軸方向及頂板部21的面方向呈傾斜且朝向裙部22之開口的端部側呈彎曲或傾斜之圓環狀的突起狀。突起部41c是從第1曲面部41b朝向前端而使厚度逐漸減少。　　[0032] 密封層42，是由相對地硬度較低(軟)且比滑動層41更軟的樹脂材料所構成。密封層42所使用的樹脂材料可列舉：烯烴系樹脂、聚酯系樹脂、苯乙烯系樹脂、丙烯酸系樹脂等，更佳為苯乙烯系彈性體和聚丙烯樹脂之摻合材、低密度聚乙烯和苯乙烯系彈性體之摻合材、聚酯系彈性體等。在本實施形態中，密封層42例如是由苯乙烯系彈性體和聚丙烯樹脂之混合材料所構成。在密封層42所使用的樹脂材料中，可適宜地添加顏料、潤滑劑、軟化劑等。　　[0033] 密封層42，是在滑動層41之與口部110相對向側的主面設置成一體。密封層42構成為圓板狀。密封層42的外徑構成為，比裙部22之內徑更小徑，與滾紋部31之內切圓為大致同一直徑或比該內切圓稍大徑，且比口部110之捲曲部113的外徑更大徑。亦即，密封層42的外徑構成為，與滑動層41的外徑相同、或是比滑動層41的外徑更大徑。　　[0034] 密封層42係具備：厚度均一之第2平板部42a、以及頂板部21側之外周緣的外表面是由曲面所構成之第2曲面部42b。第2平板部42a之與捲曲部113相對向的主面構成為平面。第2平板部42a構成為，從密封層42的中心到比與口部110之捲曲部113相對向的部位更外周側的部分之厚度均一。例如，第2平板部42a構成為，與滑動層41之第1平板部41a為同一直徑。　　第2平板部42a是與第1平板部41a一起構成密封構件12之平板部12a。在本實施形態中，第1平板部41a和第2平板部42a設定成同一厚度。　　[0035] 第2曲面部42b，係例如具有：和第2平板部42a之與捲曲部113相對向的主面形成為同一面之主面。第2曲面部42b，從比與口部110之捲曲部113相對向的部位更外周側到外周緣的部分的厚度構成為，朝向外周緣而使厚度逐漸減少。第2曲面部42b積層於第1曲面部41b及突起部41c上。第2曲面部42b是和第1曲面部41b及突起部41c一起構成密封構件12之曲面部12b。　　[0036] 如此般的滑動層41及密封層42，第1曲面部41b、突起部41c及第2曲面部42b分別形成為比第1平板部41a及第2平板部42a更薄。　　[0037] 接下來，針對用於製造蓋體1的密封構件12之模具200做說明。　　如圖3及圖5所示般，模具200係具備：下模具201、相對於下模具201可朝單方向移動之上模具202、以及與上模具202連接且用來讓上模具202移動之驅動裝置203。在圖3至圖6中，模具200的構造及詳細的符號僅在圖3及圖5中顯示，在圖4及圖6中將驅動裝置203及詳細的符號予以省略。　　[0038] 下模具201構成為，可將成形中的蓋體主體11的成形品99予以保持。下模具201係具有用於保持成形品99之凹部201a。　　[0039] 凹部201a構成為，可將成形品99之頂板部21的外表面及角部23之外周面的至少一部分予以支承。換言之，凹部201a構成為，與成形品99之頂板部21的外形及角部23的外形之一部分為相同形狀。　　[0040] 此外，凹部201a的深度，換言之至少從下模具201的上表面到凹部201a的底面之高度，只要構成為與頂板部21的厚度及密封構件12的厚度之和相同的高度即可。因此，凹部201a亦可構成為，與頂板部21的外形、角部23的外形及裙部22的外形之一部分為相同的形狀。　　[0041] 上模具202係具備：用於成形密封構件12的滑動層41之第1上模具211、用於成形密封構件12的密封層42之第2上模具212、分別使用於第1上模具211及第2上模具212之可動模213。上模具202是可藉由驅動裝置203進行移動的模具。　　[0042] 上模具202，在成形滑動層41時是使用第1上模具211及可動模213，在成形密封層42時是使用第2上模具212及可動模213。　　[0043] 第1上模具211係具備：圓筒狀的第1成形部211a、設置於第1成形部211a之另一端側的外周面之第1安裝部211b、以及設置於第1成形部211a之另一端側的內周面之第1限制部211c。第1上模具211構成為，使第1成形部211a之端面，可在從與配置於下模具201之成形品99分離的位置、到與該成形品99之頂板部21的內表面僅距離相當於滑動層41的厚度的位置之間移動。　　[0044] 第1成形部211a之前端的面構成為平面狀。第1成形部211a係具有：設置於第1成形部211a之與下模具201相對向的一端側的稜部之去角部211d。第1成形部211a的外徑構成為，與裙部22之內徑為同一直徑、或不致讓樹脂材料流入的程度之稍小徑。在此，不致讓樹脂材料流入的程度之稍小徑，是按照所使用的樹脂材料之黏度、溫度、壓力等的諸條件而適宜地決定。亦即，不致讓樹脂材料流入的程度之稍小徑是指，當樹脂材料被模具200按壓時，在第1成形部211a和裙部22之間可獲得能防止樹脂材料流入的程度之間隙的直徑。去角部211d設置於與下模具201相對向之端面及外周面的稜部。去角部211d構成為圓環狀的平面。　　[0045] 第1安裝部211b設置於第1成形部211a之另一端側的外周面。第1安裝部211b是與驅動裝置203連接。第1限制部211c構成為可限制可動模213的移動量。第1限制部211c，例如是藉由使第1成形部211a之另一端側的內徑形成為比第1成形部211a之其他部分的內徑更大徑而構成的端面，來限制可動模213的移動量。　　[0046] 第2上模具212係具備：其與下模具201相對向的一端側之端面形成為平面狀之圓筒狀的第2成形部212a、設置於第2成形部212a之另一端側的外周面之第2安裝部212b、以及設置於第2成形部212a之另一端側的內周面之第2限制部212c。第2上模具212構成為，使第2成形部212a之端面，可在從與配置於下模具201之成形品99分離的位置、到與該成形品99之頂板部21的內表面距離相當於滑動層41的厚度及密封層42的厚度之和的位置之間移動。　　[0047] 第2成形部212a構成為，一端側的端面及外周面之稜部並未去角之圓筒狀。換言之，第2上模具212並不具備第1上模具211之第1成形部211a的去角部211d。第2成形部212a之前端的面形成為平面狀。第2成形部212a的外徑構成為，與裙部22的內徑為同一直徑、或不致讓樹脂材料流入的程度之稍小徑。在此，不致讓樹脂材料流入的程度之稍小徑，是按照所使用的樹脂材料之黏度、溫度、壓力等的諸條件而適宜地決定。亦即，不致讓樹脂材料流入的程度之稍小徑是指，當樹脂材料被模具200按壓時，在第2成形部212a和裙部22之間可獲得能防止樹脂材料流入的程度之間隙的直徑。　　[0048] 第2安裝部212b係設置於第2成形部212a之另一端側的外周面。第2安裝部212b連接於驅動裝置203。第2限制部212c構成為可限制可動模213的移動量。第2限制部212c，例如是藉由使第2成形部212a之另一端側的內徑形成為比第2成形部212a之其他部分的內徑更大徑而構成的端面，來限制可動模213的移動量。　　[0049] 可動模213係具備：與下模具201相對向之一端側的端面形成為平面狀之圓柱狀的第3成形部213a、設置於第3成形部213a之另一端側的第3安裝部213b、以及設置於第3成形部213a之另一端側的外周面之被限制部213c。　　[0050] 第3成形部213a係形成為圓柱狀，其外徑形成為與第1上模具211之第1成形部211a的內徑、及第2上模具212之第2成形部212a的內徑相同。第3成形部213a之前端面形成為平面狀。　　[0051] 第3安裝部213b連接於驅動裝置203。被限制部213c係第3成形部213a之外周面，且被設置在：當與第1上模具211之第1限制部211c或第2上模具212之第2限制部212c抵接時，使第3成形部213a的端面與第1成形部211a的端面或第2成形部212a的端面成為同一面的位置。　　[0052] 驅動裝置203構成為，使第1上模具211、第2上模具212及可動模213在既定距離的範圍內，可相對於下模具201朝單方向移動。具體而言，驅動裝置203構成為，在第1成形部211a的端面與配置於下模具201之成形品99的裙部22之端部分離的位置、和第1成形部211a的端面與該成形品99之頂板部21的內表面距離相當於滑動層41的厚度的位置之間，可沿著成形品99的軸方向使第1上模具211移動。　　[0053] 驅動裝置203構成為，在第2成形部212a的端面與配置於下模具201之成形品99的裙部22之端面分離的位置、和第2成形部212a的端面與該成形品99之頂板部21的內表面距離相當於滑動層41的厚度及密封層42的厚度之和的位置之間，可沿著成形品99的軸方向使第2上模具212移動。　　[0054] 此外，驅動裝置203構成為，在與第1上模具211及第2上模具212不同的製程，可將可動模213朝向與第1上模具211及第2上模具212的移動方向相同的方向移動。驅動裝置203例如具有控制部，利用該控制部，藉由事先儲存的程式而依既定動作將第1上模具211、第2上模具212及可動模213驅動。　　[0055] 接下來，針對使用如此般構成的模具200的蓋體1之製造方法，使用圖3至圖8做說明。　　首先，將在薄平板狀之鋁合金等的金屬材料上形成有樹脂被膜層之材料進行杯狀引伸成形，而製造出具有頂板部21、裙部22及角部23之成形品99。　　[0056] 接著，將成形品99配置於下模具201的凹部。接著，作為第1製程，係將密封構件12的滑動層41進行成形。具體而言，首先，如圖3之步驟ST11所示般，驅動裝置203驅動第1上模具211及可動模213，而將第1上模具211及可動模213配置於初期位置。在此，初期位置是指，第1上模具211與配置於下模具201之成形品99分離的位置，且可動模213的端面從第1成形部211a的端面退避的位置。接著，藉由供給裝置等，對成形品99之頂板部21的中心部，供給用於成形滑動層41之熔融的第1樹脂材料151。　　[0057] 接著，如圖4的步驟ST12所示般，驅動裝置203仍舊維持初期位置的狀態而將第1上模具211及可動模213移動，直到第1成形部211a的端面與該成形品99之頂板部21之內表面的距離相當於滑動層41的厚度的位置為止。　　[0058] 藉此，第1上模具211，係在第1成形部211a的端面和成形品99之頂板部21的表面之間形成相當於滑動層41厚度的間隙。這時，因為處於可動模213的端面從第1成形部211a的端面退避的狀態，第1樹脂材料151被可動模213按壓而成為比滑動層41的厚度更厚的形狀。　　[0059] 接著，如步驟ST13所示般，驅動裝置203，以使可動模213的端面和第1成形部211a的端面成為同一面的方式將可動模213移動。可動模213的移動是經由被限制部213c與第1上模具211的第1限制部211c之抵接而被限制，藉此使第3成形部213a的端面與第1成形部211a的端面成為同一面。如此，第1樹脂材料151被可動模213按壓，如圖7之二點鏈線所示般，填充於成形品99的頂板部21及角部23的內表面和第1成形部211a的端面及可動模213的端面之間的間隙，而被壓縮成形為與滑動層41大致相同形狀。　　[0060] 亦即，第1樹脂材料151，是藉由頂板部21、第1成形部211a的端面及第3成形部213a的端面而成形為第1平板部41a的形狀，藉由角部23及第1成形部211a的端面而成形為第1曲面部41b的形狀，而且藉由角部23及第1成形部211a的去角部211d而成形為突起部41c的形狀。　　[0061] 接著，如步驟ST14所示般，驅動裝置203讓可動模213從成形品99退避，接著如步驟ST15所示般，讓第1上模具211及可動模213從成形品99退避。將壓縮成形後的第1樹脂材料151進行自然冷卻、或利用冷卻裝置冷卻，藉此讓第1樹脂材料151固化。經由第1樹脂材料151的冷卻，如圖7之實線所示般，使第1樹脂材料151收縮，成形後的滑動層41變得比蓋體主體11的內徑小。藉由前述第1製程使滑動層41成形。　　[0062] 接著，作為第2製程，是在滑動層41的主面將密封層42進行成形。具體而言，首先，如圖5之步驟ST21所示般，驅動裝置203驅動第2上模具212及可動模213，而將第2上模具212及可動模213配置於初期位置。在此，初期位置是指，第2上模具212與配置於下模具201的成形品99分離的位置，且可動模213的端面從第2成形部212a的端面退避的位置。接著，藉由供給裝置等，對在成形品99之頂板部21上所成形之滑動層41的中心部，供給用於成形密封層42之熔融的第2樹脂材料152。　　[0063] 接著，如圖6之步驟ST22所示般，驅動裝置203仍舊維持初期位置的狀態而將第2上模具212及可動模213移動，直到第2成形部212a的端面與該成形品99之頂板部21之內表面的距離相當於滑動層41及密封層42的厚度的位置為止。　　[0064] 藉此，第2上模具212，係在第2成形部212a的端面和成形品99之頂板部21的表面之間形成相當於密封層42的厚度之間隙。這時，因為處於可動模213的端面從第2成形部212a的端面退避的狀態，第2樹脂材料152被可動模213按壓而成為比密封層42的厚度更厚的形狀。　　[0065] 接著，如步驟ST23所示般，驅動裝置203以使可動模213的端面與第2成形部212a的端面成為同一面的方式將可動模213移動。可動模213之移動經由被限制部213c與第2上模具212之第2限制部212c的抵接而被限制，藉此使第3成形部213a的端面與第2成形部212a的端面成為同一面。藉此，第2樹脂材料152被可動模213按壓，如圖8之二點鏈線所示般，填充於在成形品99之頂板部21上之滑動層41及角部23的內表面和第2成形部212a的端面及可動模213的端面之間的間隙，而被壓縮成形為與密封層42大致相同形狀。　　[0066] 這時，滑動層41，受到第2樹脂材料152所致的壓力而發生彈性變形，如圖8之二點鏈線所示般，以主面呈大致平面且突起部41c呈若干突出的方式進行變形。特別是突起部41c，因為形成為薄，滑動層41的外周緣會以與成形品99之角部23的內表面密合的方式進行變形。如此，構成密封層42之第2樹脂材料152不致侵入滑動層41和角部23之間，第2樹脂材料152是在比滑動層41更上方進行成形。　　[0067] 亦即，該第2樹脂材料152，是藉由滑動層41之第1平板部41a、第2成形部212a的端面及第3成形部213a的端面而成形為第2平板部42a的形狀，並藉由角部23、第1曲面部41b、突起部41c及第2成形部212a的端面而成形為第2曲面部42b的形狀。　　[0068] 接著，如步驟ST24所示般，驅動裝置203讓可動模213從成形品99退避，接著如步驟ST25所示般，讓第2上模具212及可動模213從成形品99退避。將壓縮成形後的第2樹脂材料152進行自然冷卻、或藉由冷卻裝置冷卻，而讓第2樹脂材料152固化。如圖8之實線所示般，藉由第2上模具212及可動模213的退避會使滑動層41收縮，且藉由第2樹脂材料152的冷卻會使第2樹脂材料152收縮，成形後的密封層42變得比蓋體主體11之內徑小。藉由前述第2製程，在滑動層41上使密封層42被成形。　　[0069] 藉由前述第1製程及第2製程，讓密封構件12在成形品99內以不同個體的方式成形。接著，從成形品99將密封構件12取出，藉由實施滾紋成形等，如圖2所示般在成形品99進行滾紋部31及篡改易顯帶部33的成形。接著，在將滾紋部31及篡改易顯帶部33成形後之蓋體主體11，以曲面部12b的曲面與蓋體主體11之頂板部21側相對向的姿勢將密封構件12***。藉此成形出尚未安裝於罐容器100的狀態之蓋體1。　　[0070] 在要將罐容器100用蓋體1密封的情況，是在罐容器100內填充飲料等，將蓋體1蓋上，讓密封層42密合於捲曲部113。接著，藉由滾壓成形等，依循罐容器100之外螺紋部112的形狀而將內螺紋部32進行成形，並以在顎部111讓篡改易顯帶部33卡合的形狀進行篡改易顯帶部33的成形。藉由上述製程，使蓋體1捲封固定於罐容器100的口部110，而製造出罐容器100被蓋體1密封之罐製品。　　[0071] 依據如此般構成的蓋體1，密封構件12係在滑動層41的外周緣設置薄的突起部41c。藉此使密封構件12成為，在構成蓋體主體11之成形品99中利用第2樹脂材料152來成形密封構件12時，可防止構成密封層42之第2樹脂材料152侵入滑動層41和成形品99之間。　　[0072] 結果，成形後的密封構件12，可防止密封層42之第2樹脂材料152繞到滑動層41之與蓋體主體11相對向的一側，因此密封構件12成為，僅滑動層41與蓋體主體11接觸。如此，在從罐容器100將蓋體1卸下之開瓶動作時，可讓開瓶扭矩降低。　　[0073] 此外，密封構件12，因為可在構成蓋體主體11之成形品99內進行成形，用於裁切密封構件12的設備變得不需要。此外，用於製造之第1樹脂材料151及第2樹脂材料152只須構成密封構件12的量即可。因此，可降低密封構件12的設備成本及製造成本。　　[0074] 此外，密封構件12藉由在成形品99內進行成形，而在外周緣側具有曲面部12b。因此，在利用成形品99將密封構件12成形後，將密封構件12取出，然後在所成形的蓋體主體11將密封構件12***時，該曲面部12b可導引密封構件12的***，因此可提高組裝性。　　[0075] 如上述般之本發明的第1實施形態之蓋體1，藉由在滑動層41的外周緣設置突起部41c，可將從罐容器100將蓋體1打開時之開瓶扭矩降低。　　[0076] 本發明並不限定於上述實施形態。例如在上述例子所說明的構造，密封構件12構成為，與罐容器100之口部110的捲曲部113抵接之密封層42的主面為平面，但並不限定於此。例如，如圖9所示之第2實施形態的密封構件12A所示般，密封層42A亦可構成為，使與捲曲部113抵接的部位42c比第2平板部42a更厚。依據此構造，可將第2平板部42a的厚度降低，因此可減少密封層42A所使用之第2樹脂材料152。結果，可將密封構件12A的製造成本降低。在該密封層42A中，於製造時，是將密封層42A之第2樹脂材料152減少，而且將第2限制部212c的形狀改變成，使可動模213的端面從第2上模具212的端面稍微突出。　　[0077] 此外，例如，如圖10所示之第3實施形態的密封構件12B所示般，密封層42B亦可構成為，在與捲曲部113抵接的部位設置：與捲曲部113之內周面或外周面、或雙方抵接之環狀的突起42d。在該密封層42B中，係在第2上模具212之第2成形部212a的端面設置與突起42d相同形狀的凹部。　　[0078] 此外，在上述例子所說明的構造，密封構件12係在滑動層41讓密封層42積層為一體，但並不限定於此。例如，密封構件12亦可構成為，在滑動層41和密封層42之間利用其他樹脂材料來設置中間層。此外，模具200的驅動裝置203雖是連接於上模具202，但亦可連接於下模具201，讓下模具201移動而製造出密封構件12。　　[0079] 本發明並不限定於上述實施形態，於實施階段在不脫離其要旨的範圍內可進行各種變形。此外，各實施形態亦可適宜地組合而實施，那種情況可獲得組合的效果。再者，在上述實施形態包含各種階段的發明，利用所揭示的複數個構成要件之適當組合可取出各種的發明。 [0014] Hereinafter, the structure of the lid body 1 according to the first embodiment of the present invention, the manufacturing method of the lid body 1, and the mold 200 used for the manufacture of the lid body 1 will be described with reference to FIGS. 1 to 8 . [0015] FIG. 1 is a side view schematically showing the structure of the lid body 1 for the can container 100 according to the first embodiment of the present invention with a partial cross-section. FIG. 2 is a side view schematically showing the structure of the cover body 1 in a partial section. FIG. 3 is an explanatory diagram showing one of the first processes of the method for manufacturing the lid body 1 and the structure of the mold 200 . FIG. 4 is an explanatory diagram showing another process of the first process of the manufacturing method of the cover body 1 . FIG. 5 is an explanatory diagram showing the structure of a mold 200 in a process that is one of the second processes of the method for manufacturing the cover body 1 . FIG. 6 is an explanatory diagram showing another process of the second process of the manufacturing method of the cover body 1 . FIG. 7 is a cross-sectional view schematically showing the structure of the sliding layer 41 of the sealing member 12 in the first process of the cover body 1 . 8 is a cross-sectional view schematically showing the structure of the sliding layer 41 and the sealing layer 42 of the sealing member 12 in the second process of the cover body 1 . In FIGS. 1 and 2 , for the convenience of description, the cross-sectional structure of the lid body 1 only shows the cross-sectional portion, and the structure in side view is omitted. [0016] As shown in FIG. 1 , the lid body 1 is configured to be covered by the mouth portion 110 of the can container 100 by sealing and fixing, so that the mouth portion 110 can be sealed. [0017] Here, the can container 100 is a so-called bottle-type container that accommodates beverages and the like. For example, the tank container 100 is formed of a metal material such as an aluminum alloy having a resin film layered on both surfaces, or a surface-treated steel plate. The tank container 100 is formed in a cylindrical shape with one end portion being reduced in diameter and having different outer diameters. The can container 100 has a mouth portion 110 at one end portion for discharging the contained beverage. On the outer peripheral surface of the mouth portion 110 , from the bottom surface side of the can container 100 toward the end portion, there are sequentially a jaw portion 111 , a male screw portion 112 , and a curl portion 113 . [0018] The jaw portion 111 is configured to protrude annularly. The crimp portion 113 is formed to have a smaller diameter than the male screw portion 112 . Further, the curled portion 113 is configured to be smaller than the inner diameter of the lid body 1 . The curling portion 113 is formed by folding the end portion of the mouth portion 110 once or more. The curling portion 113 constitutes an opening portion for discharging the beverage accommodated in the can container 100 . [0019] The cover body 1 is provided with: a cover body main body 11, and a sealing member 12 disposed in the cover body main body 11 in a manner of different individuals. [0020] The lid body 11 is made of a material in which a resin coating layer is formed on a metal material such as an aluminum alloy. The cover main body 11 is formed by subjecting the thin plate-shaped material to various moldings such as cup drawing, knurling, and roll-on molding. [0021] The lid body 11 is provided with a disc-shaped top plate portion 21 and a cylindrical skirt portion 22 integrally provided on the peripheral edge portion of the top plate portion 21. The top plate portion 21 and the skirt portion 22 of the cover body 11 are formed to be integrally continuous with the corner portions 23 that are annular and curved. [0022] The top plate portion 21 is configured in a disc shape, and its main surface is configured as a flat surface. The skirt portion 22 has one end formed to be continuous with the top plate portion 21 through the corner portion 23, and the other end is open. The skirt portion 22 is provided with a plurality of knurled portions 31 provided with a vent slit 31a, a female thread portion 32, and a tamper-evident portion from the end portion on the top plate portion 21 side to the open end portion. ) belt portion 33. The knurled portion 31, the internal thread portion 32 and the tamper-prone tape portion 33 are the cylindrical shape of the top plate portion 21, the knurled portion 31, the internal thread portion 32 and the tamper-prone tape portion 33 that have not been formed yet. The cup-shaped molded product 99 constituted by the skirt portion 22 and the corner portion 23 is formed by processing such as knurling and rolling. [0024] The knurled portion 31 has a ventilation hole 31a and protrudes from the inner peripheral surface of the skirt portion 22. The female screw portion 32 is configured to be screwable with the male screw portion 112 of the tank container 100 . The tamper evident tape portion 33 is engaged with the jaw portion 111 of the can container 100 in the direction in which the lid body 1 is separated from the can container 100 and in the axial direction of the lid body 1 . In addition, the tamper-evident tape portion 33 has a break portion 33 a that is broken when the lid body 1 is unsealed, and is used for detachment from the skirt portion 22 . [0025] The sealing member 12 is constituted as a separate body from the lid body 11. The sealing member 12 is configured in a disk shape whose outer diameter is larger than the diameter of the inscribed circle of the knurled portion 31 provided in the skirt portion 22 of the lid body 11 . The sealing member 12 is integrally provided with the lid body 11 by engaging in the axial direction of the lid body 11 with the vent holes 31 a of the knurled portion 31 protruding radially from the inner peripheral surface of the skirt portion 22 . [0026] The sealing member 12 includes a disk-shaped sliding layer 41 and a disk-shaped sealing layer 42 integrally laminated on the sliding layer 41. The sealing member 12 is formed by integrally molding the sliding layer 41 and the sealing layer 42 using different resin materials. The sealing member 12 includes a flat plate portion 12a having a uniform thickness, and a curved surface portion 12b in which the outer surface of the outer peripheral edge on the side of the top plate portion 21 is formed of a curved surface. In other words, the sealing member 12 is formed in a disk shape, and the ridge on the side of the top plate portion 21 is formed of a curved surface with a predetermined curvature. [0027] The sliding layer 41 is made of a relatively high hardness (hard) resin material. In addition, the sliding layer 41 is made of a resin material that does not have adhesion and adhesion to the resin coating layer of the lid body 11 . That is, the sliding layer 41 is configured to be slidable on the top plate portion 21 in a state in which the sliding layer 41 is in a non-engaged state with the top plate portion 21 and is in contact with the top plate portion 21 . Resin materials used for the sliding layer 41 include: olefin resins such as polypropylene resins and polyethylene resins, polyester resins such as polyethylene terephthalate, styrene resins, and acrylic resins Wait. In the present embodiment, the sliding layer 41 is made of, for example, polypropylene resin. To the resin material used for the sliding layer 41, pigments, lubricants, softeners and the like can be appropriately added. [0029] The sliding layer 41 is disposed opposite to the top plate portion 21 of the cover body 11 and is a different body from the cover body 11. The sliding layer 41 is configured to be slidable with the top plate portion 21 of the lid body 11 by the resin material used. The sliding layer 41 is configured in a disk shape. The outer diameter of the sliding layer 41 is configured to be smaller than the inner diameter of the skirt portion 22 , to be substantially the same diameter as the inscribed circle of the knurled portion 31 or slightly smaller than the inscribed circle, and to be more curled than the mouth portion 110 . The outer diameter of the portion 113 is larger. The sliding layer 41 is provided with a first flat plate portion 41a having a uniform thickness, a first curved surface portion 41b whose outer surface on the outer peripheral edge of the top plate portion 21 is formed of a curved surface, and a seal provided on the first curved surface portion 41b. The protrusion 41c on the layer 42 side. The first flat plate portion 41 a is configured to have a uniform thickness from the center of the sliding layer 41 to the portion on the outer peripheral side than the portion facing the curl portion 113 of the mouth portion 110 . [0031] The thickness of the first curved portion 41b from the outer peripheral side to the outer peripheral edge of the portion facing the curl portion 113 of the mouth portion 110 is configured such that the thickness gradually decreases toward the outer peripheral edge. The protruding portion 41 c is configured as an annular protruding shape that is inclined with respect to the axial direction of the sliding layer 41 and the surface direction of the top plate portion 21 and is curved or inclined toward the end side of the opening of the skirt portion 22 . The thickness of the protruding portion 41c gradually decreases from the first curved portion 41b toward the front end. [0032] The sealing layer 42 is made of a resin material with relatively low hardness (softer) and softer than the sliding layer 41. Resin materials used for the sealing layer 42 include olefin-based resins, polyester-based resins, styrene-based resins, acrylic-based resins, and the like, and are more preferably blended materials of styrene-based elastomers and polypropylene resins, and low-density polymer resins. Blends of ethylene and styrene-based elastomers, polyester-based elastomers, etc. In the present embodiment, the sealing layer 42 is made of, for example, a mixed material of a styrene-based elastomer and a polypropylene resin. To the resin material used for the sealing layer 42, pigments, lubricants, softeners, and the like can be appropriately added. [0033] The sealing layer 42 is integrally provided on the main surface of the sliding layer 41 on the side opposite to the mouth portion 110. The sealing layer 42 is configured in a disk shape. The outer diameter of the sealing layer 42 is configured to be smaller than the inner diameter of the skirt portion 22 , to be substantially the same diameter as the inscribed circle of the knurled portion 31 or slightly larger than the inscribed circle, and to be more curled than the mouth portion 110 . The outer diameter of the portion 113 is larger. That is, the outer diameter of the sealing layer 42 is configured to be the same as the outer diameter of the sliding layer 41 or larger than the outer diameter of the sliding layer 41 . [0034] The sealing layer 42 includes a second flat plate portion 42a having a uniform thickness, and a second curved portion 42b in which the outer surface of the outer peripheral edge on the side of the top plate portion 21 is a curved surface. The main surface of the 2nd flat plate part 42a which opposes the curling part 113 is comprised as a flat surface. The second flat plate portion 42 a is configured to have a uniform thickness from the center of the sealing layer 42 to the portion on the outer peripheral side than the portion facing the curl portion 113 of the mouth portion 110 . For example, the second flat plate portion 42 a is configured to have the same diameter as the first flat plate portion 41 a of the sliding layer 41 . The second flat plate portion 42a constitutes the flat plate portion 12a of the sealing member 12 together with the first flat plate portion 41a. In the present embodiment, the first flat plate portion 41a and the second flat plate portion 42a are set to have the same thickness. [0035] The second curved surface portion 42b has, for example, a main surface formed to be the same surface as the main surface of the second flat plate portion 42a facing the curled portion 113. The thickness of the portion of the second curved portion 42b from the outer peripheral side to the outer peripheral edge from the portion facing the curl portion 113 of the mouth portion 110 is configured such that the thickness gradually decreases toward the outer peripheral edge. The second curved portion 42b is laminated on the first curved portion 41b and the protruding portion 41c. The second curved surface portion 42b constitutes the curved surface portion 12b of the sealing member 12 together with the first curved surface portion 41b and the protruding portion 41c. [0036] In the sliding layer 41 and the sealing layer 42, the first curved portion 41b, the protruding portion 41c, and the second curved portion 42b are formed thinner than the first flat portion 41a and the second flat portion 42a, respectively. [0037] Next, the mold 200 for manufacturing the sealing member 12 of the lid body 1 will be described. As shown in FIGS. 3 and 5 , the mold 200 includes a lower mold 201 , an upper mold 202 that can move in one direction relative to the lower mold 201 , and a drive connected to the upper mold 202 for moving the upper mold 202 device 203. In FIGS. 3 to 6 , the structure and detailed symbols of the mold 200 are only shown in FIGS. 3 and 5 , and the driving device 203 and detailed symbols are omitted in FIGS. 4 and 6 . [0038] The lower mold 201 is configured to hold the molded product 99 of the lid body 11 under molding. The lower mold 201 has a concave portion 201 a for holding the molded product 99 . [0039] The concave portion 201a is configured to support at least a part of the outer surface of the top plate portion 21 and the outer peripheral surface of the corner portion 23 of the molded product 99. In other words, the recessed portion 201 a is configured to have the same shape as the outer shape of the top plate portion 21 of the molded product 99 and a part of the outer shape of the corner portion 23 . In addition, the depth of the recessed portion 201a, in other words at least the height from the upper surface of the lower mold 201 to the bottom surface of the recessed portion 201a, may be configured to be the same height as the sum of the thickness of the top plate portion 21 and the thickness of the sealing member 12. Therefore, the concave portion 201 a may be configured to have the same shape as a part of the outer shape of the top plate portion 21 , the outer shape of the corner portion 23 , and the outer shape of the skirt portion 22 . The upper mold 202 is provided with: a first upper mold 211 for molding the sliding layer 41 of the sealing member 12, a second upper mold 212 for molding the sealing layer 42 of the sealing member 12, and the first upper mold respectively. 211 and the movable mold 213 of the second upper mold 212 . The upper mold 202 is a mold that can be moved by a driving device 203 . [0042] The upper mold 202 uses the first upper mold 211 and the movable mold 213 when molding the sliding layer 41, and uses the second upper mold 212 and the movable mold 213 when molding the sealing layer 42. The first upper mold 211 is provided with: a cylindrical first molding portion 211a, a first mounting portion 211b provided on the outer peripheral surface of the other end side of the first molding portion 211a, and a first molding portion 211a provided The first restricting portion 211c of the inner peripheral surface on the other end side. The first upper mold 211 is configured so that the end face of the first molding portion 211a can be located at a distance corresponding to the distance from the position separated from the molded product 99 arranged in the lower mold 201 to the inner surface of the top plate portion 21 of the molded product 99 It moves between positions of the thickness of the sliding layer 41 . [0044] The surface of the front end of the first molding portion 211a is configured to be flat. The 1st shaping|molding part 211a has the chamfered part 211d provided in the edge part of the one end side which opposes the lower die 201 of the 1st shaping|molding part 211a. The outer diameter of the first molding portion 211a is configured to be the same diameter as the inner diameter of the skirt portion 22, or a slightly smaller diameter to prevent the inflow of the resin material. Here, the slightly smaller diameter to prevent the inflow of the resin material is appropriately determined according to various conditions such as the viscosity, temperature, and pressure of the resin material to be used. That is, the slightly smaller diameter to prevent the inflow of the resin material means that when the resin material is pressed by the mold 200, a gap is obtained between the first molding portion 211a and the skirt portion 22 to the extent that the inflow of the resin material can be prevented. diameter. The chamfered part 211d is provided in the edge part of the end surface and the outer peripheral surface which oppose the lower mold|type 201. The chamfered portion 211d is formed as an annular flat surface. [0045] The first mounting portion 211b is provided on the outer peripheral surface of the other end side of the first molding portion 211a. The first mounting portion 211b is connected to the drive device 203 . The first restricting portion 211c is configured to restrict the amount of movement of the movable mold 213 . The first restricting portion 211c restricts the movable die 213 by, for example, an end face formed by forming the inner diameter of the other end side of the first molding portion 211a to be larger than the inner diameter of the other portion of the first molding portion 211a. amount of movement. The 2nd upper mold 212 is provided with: the end face of the one end side opposite to the lower mold 201 is formed into a flat cylindrical second molding part 212a; The 2nd mounting part 212b of the outer peripheral surface, and the 2nd restricting part 212c provided in the inner peripheral surface of the other end side of the 2nd molding part 212a. The second upper mold 212 is configured so that the end face of the second molding portion 212a can be located at a distance corresponding to the distance from the position separated from the molded product 99 arranged in the lower mold 201 to the inner surface of the top plate portion 21 of the molded product 99 The position of the sum of the thickness of the sliding layer 41 and the thickness of the sealing layer 42 is shifted. [0047] The second molding portion 212a is configured in a cylindrical shape in which the end face on one end side and the edge portion of the outer peripheral face are not chamfered. In other words, the second upper mold 212 does not include the chamfered portion 211d of the first molding portion 211a of the first upper mold 211 . The front end surface of the second molding portion 212a is formed in a flat shape. The outer diameter of the second molding portion 212a is configured to be the same diameter as the inner diameter of the skirt portion 22, or a slightly smaller diameter to prevent the inflow of the resin material. Here, the slightly smaller diameter to prevent the inflow of the resin material is appropriately determined according to various conditions such as the viscosity, temperature, and pressure of the resin material to be used. That is, the slightly smaller diameter to prevent the inflow of the resin material means that when the resin material is pressed by the mold 200, a gap is obtained between the second molding portion 212a and the skirt portion 22 to the extent that the inflow of the resin material can be prevented. diameter. [0048] The second mounting portion 212b is provided on the outer peripheral surface of the other end side of the second molding portion 212a. The second mounting portion 212b is connected to the drive device 203 . The second restricting portion 212c is configured to restrict the amount of movement of the movable mold 213 . The second restricting portion 212c is, for example, an end surface formed by forming the inner diameter of the other end side of the second molding portion 212a to be larger than the inner diameter of the other portion of the second molding portion 212a, thereby restricting the movable mold 213 amount of movement. The movable mold 213 is provided with: a third molding portion 213a whose end face on one end side facing the lower mold 201 is formed into a flat cylindrical shape, and a third mounting portion provided on the other end side of the third molding portion 213a 213b, and a restricted portion 213c provided on the outer peripheral surface of the other end side of the third molding portion 213a. The 3rd molding portion 213a is formed into a cylindrical shape, and its outer diameter is formed with the inner diameter of the 1st molding portion 211a of the 1st upper mold 211 and the inner diameter of the 2nd molding portion 212a of the 2nd upper mold 212 same. The front end face of the third molding portion 213a is formed in a flat shape. [0051] The third mounting portion 213b is connected to the driving device 203. The restricted portion 213c is the outer peripheral surface of the third molding portion 213a, and is provided so as to make the first restricting portion 211c of the first upper mold 211 or the second restricting portion 212c of the second upper mold 212 come into contact with each other. The end face of the 3-molded portion 213a and the end face of the first molded portion 211a or the end face of the second molded portion 212a are at the same position. [0052] The driving device 203 is configured so that the first upper mold 211, the second upper mold 212, and the movable mold 213 can move in one direction relative to the lower mold 201 within a range of a predetermined distance. Specifically, the drive device 203 is configured such that the end surface of the first molding portion 211a is separated from the end portion of the skirt portion 22 of the molded product 99 arranged in the lower die 201, and the end surface of the first molding portion 211a is separated from the molding portion 211a. The first upper mold 211 can be moved in the axial direction of the molded product 99 between the inner surface of the top plate portion 21 of the product 99 at a distance corresponding to the thickness of the sliding layer 41 . The driving device 203 is configured such that the end surface of the second molding portion 212a is separated from the end surface of the skirt portion 22 of the molded product 99 arranged in the lower die 201, and the end surface of the second molding portion 212a is separated from the molded product 99. The second upper mold 212 can be moved along the axial direction of the molded product 99 between the inner surface of the top plate portion 21 and the position corresponding to the sum of the thickness of the sliding layer 41 and the thickness of the sealing layer 42 . In addition, the driving device 203 is configured to move the movable mold 213 toward the same moving direction as the first upper mold 211 and the second upper mold 212 in a different process from the first upper mold 211 and the second upper mold 212. move in the direction. The driving device 203 includes, for example, a control unit, and the control unit drives the first upper mold 211 , the second upper mold 212 , and the movable mold 213 according to a predetermined operation according to a program stored in advance. [0055] Next, a method of manufacturing the lid body 1 using the mold 200 thus constructed will be described with reference to FIGS. 3 to 8 . First, a material having a resin coating layer formed on a metal material such as an aluminum alloy in the form of a thin plate is subjected to cup-shape drawing to produce a molded product 99 having a top plate portion 21 , a skirt portion 22 and a corner portion 23 . [0056] Next, the molded product 99 is placed in the concave portion of the lower mold 201. Next, as a first process, the sliding layer 41 of the sealing member 12 is formed. Specifically, first, as shown in step ST11 of FIG. 3 , the driving device 203 drives the first upper mold 211 and the movable mold 213 to arrange the first upper mold 211 and the movable mold 213 at the initial position. Here, the initial position refers to a position where the first upper mold 211 is separated from the molded product 99 arranged in the lower mold 201, and the end face of the movable mold 213 is retracted from the end face of the first molding portion 211a. Next, the molten first resin material 151 for molding the sliding layer 41 is supplied to the center portion of the top plate portion 21 of the molded product 99 by a supply device or the like. Next, as shown in step ST12 of FIG. 4 , the driving device 203 still maintains the state of the initial position and moves the first upper mold 211 and the movable mold 213 until the end face of the first molding portion 211a and the molded product 99 The distance from the inner surface of the top plate portion 21 is up to the position corresponding to the thickness of the sliding layer 41 . [0058] Thereby, the first upper mold 211 forms a gap corresponding to the thickness of the sliding layer 41 between the end face of the first molding portion 211a and the surface of the top plate portion 21 of the molded product 99. At this time, the first resin material 151 is pressed by the movable mold 213 and has a shape thicker than the thickness of the sliding layer 41 because the end face of the movable mold 213 is retracted from the end face of the first molding portion 211 a. [0059] Next, as shown in step ST13, the drive device 203 moves the movable mold 213 so that the end face of the movable mold 213 and the end face of the first molding portion 211a are flush. The movement of the movable mold 213 is restricted by the abutment of the restricted portion 213c with the first restricting portion 211c of the first upper mold 211, whereby the end face of the third molding portion 213a and the end face of the first molding portion 211a are the same. noodle. In this way, the first resin material 151 is pressed by the movable mold 213, and as shown by the two-dot chain line in FIG. The gap between the end faces of the movable mold 213 is compression-molded into substantially the same shape as the sliding layer 41 . That is, the first resin material 151 is formed into the shape of the first flat plate portion 41a by the top plate portion 21, the end surface of the first molding portion 211a, and the end surface of the third molding portion 213a, and the corner portion 23 And the end surface of the 1st molding part 211a is shape|molded into the shape of the 1st curved surface part 41b, and the shape of the protrusion part 41c is shape|molded by the corner part 23 and the chamfered part 211d of the 1st molding part 211a. Next, as shown in step ST14, the driving device 203 retracts the movable mold 213 from the molded product 99, and then retracts the first upper mold 211 and the movable mold 213 from the molded product 99 as shown in step ST15. The compression-molded first resin material 151 is naturally cooled or cooled by a cooling device to solidify the first resin material 151 . By cooling the first resin material 151 , as shown by the solid line in FIG. 7 , the first resin material 151 is shrunk, and the molded sliding layer 41 becomes smaller than the inner diameter of the lid body 11 . The sliding layer 41 is formed by the aforementioned first process. [0062] Next, as a second process, the sealing layer 42 is formed on the main surface of the sliding layer 41. Specifically, first, as shown in step ST21 in FIG. 5 , the driving device 203 drives the second upper mold 212 and the movable mold 213 to arrange the second upper mold 212 and the movable mold 213 at the initial position. Here, the initial position refers to a position where the second upper mold 212 is separated from the molded product 99 arranged in the lower mold 201, and the end face of the movable mold 213 is retracted from the end face of the second molding portion 212a. Next, the molten second resin material 152 for forming the sealing layer 42 is supplied to the center portion of the sliding layer 41 formed on the top plate portion 21 of the molded product 99 by a supply device or the like. Next, as shown in step ST22 of FIG. 6, the driving device 203 still maintains the state of the initial position and moves the second upper mold 212 and the movable mold 213 until the end face of the second molding portion 212a and the molded product 99 The distance between the inner surfaces of the top plate portion 21 corresponds to the thickness of the sliding layer 41 and the sealing layer 42 . [0064] Thereby, the second upper mold 212 forms a gap corresponding to the thickness of the sealing layer 42 between the end face of the second molding portion 212a and the surface of the top plate portion 21 of the molded product 99. At this time, since the end face of the movable mold 213 is retracted from the end face of the second molding portion 212 a, the second resin material 152 is pressed by the movable mold 213 and has a shape thicker than the thickness of the sealing layer 42 . [0065] Next, as shown in step ST23, the driving device 203 moves the movable mold 213 so that the end face of the movable mold 213 and the end face of the second molding portion 212a are flush. The movement of the movable mold 213 is restricted by the abutment of the restricted portion 213c and the second restricting portion 212c of the second upper mold 212, whereby the end face of the third molding portion 213a and the end face of the second molding portion 212a are flush with each other. . Thereby, the second resin material 152 is pressed by the movable mold 213, and as shown by the two-dot chain line in FIG. The gap between the end face of the molding portion 212a and the end face of the movable mold 213 is compression-molded into substantially the same shape as the sealing layer 42. At this time, the sliding layer 41 is elastically deformed by the pressure caused by the second resin material 152, as shown by the two-dot chain line in FIG. way to deform. In particular, since the protruding portion 41 c is formed thin, the outer peripheral edge of the sliding layer 41 is deformed so as to be in close contact with the inner surface of the corner portion 23 of the molded product 99 . In this way, the second resin material 152 constituting the sealing layer 42 does not intrude between the sliding layer 41 and the corner portion 23 , and the second resin material 152 is molded above the sliding layer 41 . That is, the second resin material 152 is formed into the second flat plate portion 42a by the first flat plate portion 41a of the sliding layer 41, the end surface of the second molding portion 212a, and the end surface of the third molding portion 213a. shape, and is molded into the shape of the second curved portion 42b by the corner portion 23, the first curved portion 41b, the protruding portion 41c, and the end surface of the second molded portion 212a. [0068] Next, as shown in step ST24, the driving device 203 retracts the movable mold 213 from the molded product 99, and then retracts the second upper mold 212 and the movable mold 213 from the molded product 99 as shown in step ST25. The compression-molded second resin material 152 is naturally cooled or cooled by a cooling device to solidify the second resin material 152 . As shown by the solid line in FIG. 8 , the sliding layer 41 is contracted by the retraction of the second upper mold 212 and the movable mold 213 , and the second resin material 152 is contracted by the cooling of the second resin material 152 . The subsequent sealing layer 42 becomes smaller than the inner diameter of the lid body 11 . By the aforementioned second process, the sealing layer 42 is formed on the sliding layer 41 . [0069] Through the aforementioned first process and second process, the sealing member 12 is formed in the molded product 99 in different individual ways. Next, the sealing member 12 is taken out from the molded product 99, and by performing knurling or the like, as shown in FIG. Next, after molding the knurled portion 31 and the tamper-evident tape portion 33 , the lid body 11 is inserted into the sealing member 12 with the curved surface of the curved portion 12b facing the top plate portion 21 side of the lid body 11 . Thereby, the lid body 1 in a state not yet attached to the tank container 100 is formed. [0070] When the can container 100 is to be sealed with the lid body 1, the can container 100 is filled with beverages, etc., the lid body 1 is covered, and the sealing layer 42 is brought into close contact with the curled portion 113. Next, by roll forming or the like, the female thread portion 32 is formed in accordance with the shape of the male thread portion 112 of the can container 100 , and the tamper-evidence-indicating tape portion 33 is engaged with the jaw portion 111 to form the female-thread portion 32 . Forming of the belt portion 33 . Through the above process, the lid body 1 is crimped and fixed to the mouth portion 110 of the can container 100 to manufacture a can product in which the can container 100 is sealed by the lid body 1 . [0071] According to the cover body 1 thus constructed, the sealing member 12 is provided with a thin protrusion 41c on the outer peripheral edge of the sliding layer 41. Thereby, the sealing member 12 can prevent the second resin material 152 constituting the sealing layer 42 from entering the sliding layer 41 and molding when the sealing member 12 is molded with the second resin material 152 in the molded product 99 constituting the lid body 11 . Between 99. As a result, the molded sealing member 12 can prevent the second resin material 152 of the sealing layer 42 from wrapping around to the side of the sliding layer 41 opposite to the lid body 11, so the sealing member 12 becomes only the sliding layer 41. Contact with the cover body 11 . In this way, the bottle-opening torque can be reduced during the bottle-opening operation in which the cap body 1 is removed from the can container 100 . [0073] In addition, since the sealing member 12 can be formed in the molded product 99 constituting the lid body main body 11, equipment for cutting the sealing member 12 becomes unnecessary. In addition, the 1st resin material 151 and the 2nd resin material 152 used for manufacture need only be the quantity which comprises the sealing member 12. Therefore, the equipment cost and manufacturing cost of the sealing member 12 can be reduced. [0074] In addition, the sealing member 12 has a curved surface portion 12b on the outer peripheral edge side by being molded in the molded product 99. Therefore, after the sealing member 12 is formed by the molded product 99, the sealing member 12 is taken out, and when the sealing member 12 is inserted into the formed lid body 11, the curved portion 12b can guide the insertion of the sealing member 12, so Assemblability can be improved. As described above, in the cap body 1 according to the first embodiment of the present invention, by providing the protruding portion 41c on the outer peripheral edge of the sliding layer 41, the bottle opening torque when the cap body 1 is opened from the can container 100 can be reduced. . [0076] The present invention is not limited to the above-mentioned embodiments. For example, in the structure described in the above example, the sealing member 12 is configured such that the main surface of the sealing layer 42 abutting against the curled portion 113 of the mouth portion 110 of the can container 100 is flat, but it is not limited to this. For example, as shown in the sealing member 12A of the second embodiment shown in FIG. 9 , the sealing layer 42A may be configured such that the portion 42c abutting against the curl portion 113 is thicker than the second flat plate portion 42a. According to this structure, since the thickness of the 2nd flat plate part 42a can be reduced, the 2nd resin material 152 used for the sealing layer 42A can be reduced. As a result, the manufacturing cost of the sealing member 12A can be reduced. In the sealing layer 42A, the second resin material 152 of the sealing layer 42A is reduced during manufacture, and the shape of the second restricting portion 212c is changed so that the end face of the movable mold 213 is separated from the end face of the second upper mold 212 Slightly prominent. In addition, for example, as shown in the sealing member 12B of the third embodiment shown in FIG. 10 , the sealing layer 42B may be configured so as to be provided at the portion in contact with the curled portion 113: within the curled portion 113 The peripheral surface, the outer peripheral surface, or the annular protrusion 42d abutting on both of them. In the sealing layer 42B, a concave portion having the same shape as the projection 42d is provided on the end surface of the second molding portion 212a of the second upper mold 212 . [0078] In addition, in the structure described in the above example, the sealing member 12 is connected to the sliding layer 41 and the sealing layer 42 is integrally laminated, but it is not limited to this. For example, the sealing member 12 may be configured such that an intermediate layer is provided between the sliding layer 41 and the sealing layer 42 using another resin material. In addition, although the driving device 203 of the mold 200 is connected to the upper mold 202 , it can also be connected to the lower mold 201 to move the lower mold 201 to manufacture the sealing member 12 . [0079] The present invention is not limited to the above-described embodiment, and various modifications can be made in the implementation stage without departing from the gist of the present invention. In addition, the respective embodiments may be appropriately combined and implemented, and in that case, combined effects can be obtained. Furthermore, the above-described embodiments include inventions in various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements.

[0080]1‧‧‧蓋體11‧‧‧蓋體主體12、12A、12B‧‧‧密封構件12a‧‧‧平板部12b‧‧‧曲面部21‧‧‧頂板部22‧‧‧裙部23‧‧‧角部31‧‧‧滾紋部32‧‧‧內螺紋部33‧‧‧篡改易顯帶部33a‧‧‧斷裂部41‧‧‧滑動層41a‧‧‧第1平板部41b‧‧‧第1曲面部42、42A、42B‧‧‧密封層42a‧‧‧第2平板部42b‧‧‧第2曲面部99‧‧‧成形品100‧‧‧罐容器110‧‧‧口部111‧‧‧顎部112‧‧‧外螺紋部113‧‧‧捲曲部151‧‧‧第1樹脂材料152‧‧‧第2樹脂材料200‧‧‧模具201‧‧‧下模具201a‧‧‧凹部202‧‧‧上模具203‧‧‧驅動裝置211‧‧‧第1上模具211a‧‧‧第1成形部211b‧‧‧第1安裝部211c‧‧‧第1限制部211d‧‧‧去角部212‧‧‧第2上模具212a‧‧‧第2成形部212b‧‧‧第2安裝部212c‧‧‧第2限制部213‧‧‧可動模213a‧‧‧第3成形部213b‧‧‧第3安裝部213c‧‧‧被限制部[0080] 1‧‧‧cover body 11‧‧‧cover body main body 12, 12A, 12B‧‧‧sealing member 12a‧‧‧flat plate part 12b‧‧‧curved surface part 21‧‧‧top plate part 22‧‧‧skirt 23‧‧‧Corner part 31‧‧‧Rolling part 32‧‧‧Internal thread part 33‧‧‧Easy tampering belt part 33a‧‧‧Break part 41‧‧‧Sliding layer 41a‧‧‧First flat plate part 41b ‧‧‧First curved surface portion 42, 42A, 42B‧‧‧Sealing layer 42a‧‧‧Second flat plate portion 42b‧‧‧Second curved surface portion 99‧‧‧Molded product 100‧‧‧Can container 110‧‧‧mouth Part 111‧‧‧Jaw part 112‧‧‧External thread part 113‧‧‧Crimping part 151‧‧‧First resin material 152‧‧‧Second resin material 200‧‧‧Mold 201‧‧‧Lower mold 201a‧‧ ‧Recessed part 202‧‧‧Upper die 203‧‧‧Driver 211‧‧‧First upper die 211a‧‧‧First molding part 211b‧‧‧First mounting part 211c‧‧‧First restricting part 211d‧‧‧ Chamfering part 212‧‧‧Second upper die 212a‧‧‧Second molding part 212b‧‧‧Second mounting part 212c‧‧‧Second restricting part 213‧‧‧ Movable die 213a‧‧‧third molding part 213b ‧‧‧The third mounting part 213c‧‧‧Restricted part

[0013] 　　圖1係將本發明的第1實施形態之罐容器用的蓋體之構造以局部剖面示意顯示之側視圖。　　圖2係將該蓋體之構造以局部剖面示意顯示之側視圖。　　圖3係顯示該蓋體之製造方法的第1製程之一製程的說明圖。　　圖4係顯示該蓋體之製造方法的第1製程之其他製程的說明圖。　　圖5係顯示該蓋體之製造方法的第2製程之一製程的說明圖。　　圖6係顯示該蓋體之製造方法的第2製程之其他製程的說明圖。　　圖7係將在該蓋體之第1製程之密封構件的主要部分構造示意顯示之剖面圖。　　圖8係將在該蓋體之第2製程之密封構件的主要部分構造示意顯示之剖面圖。　　圖9係將本發明的第2實施形態的蓋體之構造以局部剖面示意顯示之側視圖。　　圖10係將本發明的第3實施形態的蓋體之構造以局部剖面示意顯示之側視圖。1 is a side view schematically showing the structure of the lid body for a can container according to the first embodiment of the present invention with a partial cross-section. Figure 2 is a side view schematically showing the structure of the cover body in partial section. Fig. 3 is an explanatory diagram showing one of the first processes of the manufacturing method of the cover body. Fig. 4 is an explanatory diagram showing another process of the first process of the manufacturing method of the cover body. Fig. 5 is an explanatory diagram showing one of the second processes of the manufacturing method of the cover body. Fig. 6 is an explanatory diagram showing another process of the second process of the manufacturing method of the cover body. Figure 7 is a cross-sectional view schematically showing the structure of the main part of the sealing member in the first process of the cover body. Figure 8 is a cross-sectional view schematically showing the structure of the main part of the sealing member in the second process of the cover body. Fig. 9 is a side view schematically showing the structure of the cover body according to the second embodiment of the present invention with a partial cross section. Fig. 10 is a side view schematically showing the structure of the lid body according to the third embodiment of the present invention with a partial cross section.

1‧‧‧蓋體 1‧‧‧Cover

11‧‧‧蓋體主體 11‧‧‧Main body of cover

12‧‧‧密封構件 12‧‧‧Sealing components

12a‧‧‧平板部 12a‧‧‧Flat plate

12b‧‧‧曲面部 12b‧‧‧Curved surface

21‧‧‧頂板部 21‧‧‧Top Plate

22‧‧‧裙部 22‧‧‧Skirt

23‧‧‧角部 23‧‧‧Corner

31‧‧‧滾紋部 31‧‧‧Rolling part

31a‧‧‧通氣孔 31a‧‧‧Vent hole

32‧‧‧內螺紋部 32‧‧‧Internal thread

33‧‧‧篡改易顯帶部 33‧‧‧Easy to tamper with the display belt

33a‧‧‧斷裂部 33a‧‧‧Break

41‧‧‧滑動層 41‧‧‧Sliding layer

41a‧‧‧第1平板部 41a‧‧‧1st flat plate

41b‧‧‧第1曲面部 41b‧‧‧First curved surface

41c‧‧‧突起部 41c‧‧‧Protrusion

42‧‧‧密封層 42‧‧‧Sealing layer

42a‧‧‧第2平板部 42a‧‧‧Second flat plate

42b‧‧‧第2曲面部 42b‧‧‧Second curved surface

100‧‧‧罐容器 100‧‧‧Can container

110‧‧‧口部 110‧‧‧Oral

111‧‧‧顎部 111‧‧‧ Jaw

112‧‧‧外螺紋部 112‧‧‧External thread

113‧‧‧捲曲部 113‧‧‧Crimping

Claims

一種蓋體，係具備蓋體主體及圓板狀的密封構件，前述蓋體主體，係具有頂板部、及透過呈圓環且曲面狀的角部而與前述頂板部設置成一體之裙部，且被螺合於罐容器的口部；前述密封構件，係設置成與前述蓋體主體為不同個體且與前述頂板部相對向，並具有滑動層及密封層，前述滑動層，係在比當前述蓋體主體與前述罐容器螺合時與前述口部相對向的部位更外周側形成有突起部，且是與前述頂板部進行滑動，前述突起部是朝向外周緣其厚度逐漸變薄；前述密封層，係與前述滑動層設置成一體且用於密封前述口部，前述突起部，係相對於前述滑動層的軸方向呈傾斜之圓環狀的突起狀。 A cover is provided with a cover main body and a disc-shaped sealing member, the cover main body having a top plate portion and a skirt portion integrally provided with the top plate portion through a circular and curved corner portion, and is screwed to the mouth of the tank container; the sealing member is arranged to be a different body from the cover main body and is opposite to the top plate portion, and has a sliding layer and a sealing layer, the sliding layer is fastened on the side. When the lid body is screwed with the tank container, a protruding portion is formed on the outer peripheral side of the portion facing the mouth portion, and slides with the top plate portion, and the protruding portion gradually becomes thinner toward the outer periphery; the aforementioned The sealing layer is integrally formed with the sliding layer and used to seal the mouth, and the protrusion is an annular protrusion that is inclined with respect to the axial direction of the sliding layer.

如請求項1所述之蓋體，其中，前述密封層，其與前述口部相對向的部位之外周側，是比與前述口部相對向的部位之厚度更薄。 The cover body according to claim 1, wherein the outer peripheral side of the portion facing the mouth portion of the sealing layer is thinner than the portion facing the mouth portion.

如請求項2所述之蓋體，其中，前述滑動層係具有平板部、曲面部及前述突起部，前述平板部，從中心到比與前述口部相對向的部位更外周側是構成為平板狀，前述曲面部，從比與前述口部相對向的部位更外周側朝向前述外周緣是使厚度逐漸減少，前述突起部，係形成於前述曲面部之前述密封層側的主面之前述外周緣，相對於前述平板部之軸方向及前述平板部之主面的面方向形成傾斜。 The cover according to claim 2, wherein the sliding layer has a flat plate portion, a curved surface portion, and the protruding portion, and the flat plate portion is formed as a flat plate from the center to the outer peripheral side than the portion facing the mouth portion. shape, The curved portion is gradually reduced in thickness from the outer peripheral side toward the outer peripheral edge from the portion facing the mouth portion, and the protruding portion is formed on the outer peripheral edge of the main surface on the sealing layer side of the curved portion, An inclination is formed with respect to the axial direction of the said flat plate part and the surface direction of the main surface of the said flat plate part.

一種模具，係具備下模具、第1上模具及第2上模具，前述下模具係具有凹部，前述凹部是與構成蓋體主體之成形品之頂板部的外形及呈圓環且曲面狀的角部之至少一部分的外形形成為相同形狀，前述蓋體主體係具有前述頂板部及透過前述角部而與前述頂板部設置成一體的裙部；前述第1上模具，係具有與前述裙部的內徑相同或是能防止樹脂材料流入之外徑且在端面和外周面之稜部具有平面的去角部，係用於成形設置成與前述蓋體主體為不同個體之密封構件的滑動層，前述第2上模具，係具有與前述裙部的內徑相同或是能防止樹脂材料流入的外徑且端面與前述下模具相對向，係用於成形前述密封構件之密封層，藉由前述去角部，在前述滑動層上，在比當前述蓋體主體與罐容器螺合時與前述罐容器的口部相對向的部位更外周側形成有突起部，前述突起部是朝向外周緣其厚度逐漸變薄，且相對於前述滑動層的軸方向呈傾斜之圓環狀的突起狀。 A mold comprising a lower mold, a first upper mold, and a second upper mold, wherein the lower mold has a concave portion, and the concave portion is formed with an outer shape of a top plate portion of a molded product constituting a cover body and a circular and curved angle. The outer shape of at least a part of the part is formed in the same shape, the cover main body has the top plate part and the skirt part integrated with the top plate part through the corner part; the first upper mold has the same shape as the skirt part. The inner diameter is the same or the chamfered portion which can prevent the resin material from flowing into the outer diameter and has a flat surface at the edge portion of the end face and the outer peripheral surface is used to form the sliding layer of the sealing member which is different from the aforementioned cover body, The second upper mold has the same inner diameter as the skirt or an outer diameter capable of preventing the resin material from flowing in, and has an end face opposite to the lower mold, and is used for forming the sealing layer of the sealing member. In the corner portion, on the sliding layer, a protruding portion is formed on the outer peripheral side than a portion facing the mouth of the can container when the lid body is screwed to the can container, and the protruding portion has a thickness toward the outer peripheral edge. It is gradually thinned, and has an inclined annular protrusion shape with respect to the axial direction of the sliding layer.

如請求項4所述之模具，其中，前述去角部係在前述第1上模具設置成面對：比當前述蓋體主體與前述罐容器螺合時前述頂板部之與前述罐容器的前述口部相對向的部位更外周側。 The mold according to claim 4, wherein the chamfered portion is provided on the first upper mold so as to face a greater distance between the top plate portion and the tank container than when the lid body and the tank container are screwed together. The portion facing the mouth is on the outer peripheral side.

如請求項4所述之模具，其中，前述凹部的深度，是構成為與前述頂板部的厚度及前述密封構件的厚度之和相同的高度。 The mold according to claim 4, wherein the depth of the recessed portion is configured to be the same height as the sum of the thickness of the top plate portion and the thickness of the sealing member.

一種蓋體之製造方法，係在下模具的凹部配置構成蓋體主體之成形品，前述蓋體主體係具有頂板部、及透過呈圓環且曲面狀的角部而與前述頂板部設置成一體的裙部，前述凹部是與前述成形品之前述頂板部的外形及前述角部之至少一部分的外形形成為相同形狀；對前述頂板部供給第1樹脂材料，藉由第1上模具將前述第1樹脂材料進行成形，而構成設置成與前述蓋體主體為不同個體之密封構件的滑動層，前述第1上模具係具有與前述裙部的內徑相同的外徑且在端面和外周面之稜部具有平面的去角部；對前述滑動層供給第2樹脂材料，藉由第2上模具將前述第2樹脂材料進行成形而在前述滑動層上構成密封層，前述第2上模具係具有與前述裙部的內徑相同的外徑且端面與前述下模具相對向，藉由前述去角部，在前述滑動層上，在比當前述蓋體主體與罐容器螺合時與前述罐容器的口部相對向的部位更外周側形成有突起部，前述突起部是朝向外周緣其厚度逐漸變薄，且相對於前述滑動層的軸方向呈傾斜之圓環狀的突起狀。 A method for manufacturing a cover, comprising disposing a molded product constituting a cover main body in a recess of a lower mold, the cover main body having a top plate portion and a corner portion formed integrally with the top plate portion through a circular and curved corner portion. In the skirt portion, the recessed portion is formed in the same shape as the outer shape of the top plate portion and the outer shape of at least a part of the corner portion of the molded product; a first resin material is supplied to the top plate portion, and the first upper mold is used to form the first resin material. The resin material is molded to constitute a sliding layer of a sealing member provided as a separate body from the cover body, the first upper mold has the same outer diameter as the inner diameter of the skirt, and the edge between the end surface and the outer peripheral surface is formed. A second resin material is supplied to the sliding layer, and a sealing layer is formed on the sliding layer by molding the second resin material by a second upper mold, and the second upper mold has a The inner diameter of the skirt portion is the same as the outer diameter and the end face is opposite to the lower mold, By the chamfered portion, a protrusion is formed on the sliding layer on the outer peripheral side than a portion facing the mouth of the can container when the lid body is screwed to the can container, and the protrusion is directed toward the can container. The thickness of the outer peripheral edge gradually becomes thinner, and is in the shape of an annular protrusion inclined with respect to the axial direction of the sliding layer.

如請求項7所述之蓋體之製造方法，其中，前述去角部係在前述第1上模具設置成面對：比當前述蓋體主體與前述罐容器螺合時前述頂板部之與前述罐容器的前述口部相對向的部位更外周側。 The method of manufacturing a cover body according to claim 7, wherein the chamfered portion is arranged on the first upper mold to face a ratio of the top plate portion to the top plate portion when the cover body is screwed to the can container. The portion facing the mouth of the can container is on the outer peripheral side.

如請求項7所述之蓋體之製造方法，其中，前述凹部的深度，是構成為與前述頂板部的厚度及前述密封構件的厚度之和相同的高度。 The method of manufacturing a lid according to claim 7, wherein the depth of the recessed portion is configured to be the same height as the sum of the thickness of the top plate portion and the thickness of the sealing member.