MANUFACTURING METHOD OF PACKAGING CONTAINER AND PACKAGING CONTAINER

To improve strength of a mouth member.SOLUTION: In a manufacturing method of a packaging container based on the present disclosure, a mold 5 includes an inner mold 51 to be inserted in an inside of a drum part 10 from an opening of an opening end part 111 and an outer mold 52 sandwiching the opening end part 111 together with the inner mold 51. The inner mold 51 includes a reception part 511 for receiving the opening end part 111 in an opening direction DO which is a direction to an opening end part 111 from a bottom part 12 and a recess 512 dented from the reception part 511 in the opening direction DO. In an arrangement process S2, a seal end part 111S which is a portion constituting a side seal part S among the opening end part 111 is arranged so as to be opposed to the recess 512. In a molding process D3, a resin is injected so that the resin is supplied to the recess 512 which is in a state of being opposed to the seal end part 111S.SELECTED DRAWING: Figure 13 【課題】口部材の強度を向上させる。【解決手段】本開示に基づく包装容器の製造方法において、金型５は、開口端部１１１の開口から胴部１０内に挿入される内金型５１と、内金型５１ととともに開口端部１１１を挟み込む外金型５２とを有している。内金型５１は、底部１２から開口端部１１１に向かう方向である開口方向ＤＯにおいて開口端部１１１を受ける受け部５１１と、開口方向ＤＯにおいて受け部５１１から窪んでいる凹部５１２とを有している。配置工程Ｓ２では、開口端部１１１のうちサイドシール部Ｓを構成する部分であるシール端部１１１Ｓを、凹部５１２と対向するように配置する。成形工程Ｄ３では、シール端部１１１Ｓと対向した状態の凹部５１２に樹脂が供給されるように樹脂を射出する。【選択図】図１３