METHODS AND APPARATUSES FOR INJECTION MOLDING WALLED STRUCTURES

• Main Authors: BERNARD SOL, HERVE PICHOT, BRUCE RABINNE, JEAN-PIERRE GIRAUD
• Format: Patent
• Language: English; Japanese
• Published: 18.03.2021
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; BABY COMFORTERS; CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICALPURPOSES; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR; DEVICES FOR RECEIVING SPITTLE; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROMTHE BODY; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGINGPHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL ORADMINISTERING FORMS; HUMAN NECESSITIES; HYGIENE; MEDICAL OR VETERINARY SCIENCE; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

To provide an injection molding apparatus for molding a medical barrel having a distortion-free outer wall and a bypass recess within an inner wall of the medical barrel so that the medical barrel can be extracted from the injection molding apparatus in an axial direction (i.e., along a direction of a center axis line of the medical barrel).SOLUTION: An injection molding apparatus 300 includes: a mold block; an inner core 352 that passes through a cylindrical opening part, is adapted so as to occupy a part of a mold cavity to define a molding space outside the inner core and inside the mold cavity for forming the medical barrel, and includes a space in the longer direction in the inner core; an actuator 382 capable of displacing, in an axial direction, the space 380 in the longer direction; and an embossing member 386 that when molten thermoelastic plastic material is filled in the molding space, cooperates with the actuator to form a bypass recess within an inner wall of the medical barrel.SELECTED DRAWING: Figure 9 【課題】射出成形装置から軸方向に（すなわち、医療バレルの中心軸線の方向に沿って）取り出され得るように医療バレルの内壁内のバイパス溝と、歪みのない外壁とを有する医療バレルを成形する射出成形装置を提供する。【解決手段】射出成形装置３００は、金型ブロックと、内部コア３５２であって、円筒状開口部を通過し、且つ前記内部コアの外部であるが、前記医療バレルを形成するための型穴内である成形スペースを画定するために前記型穴内の一部分を占有するように適合され、前記内部コア内に長手方向のスペースを含む、内部コアと、前記長手方向のスペース３８０内を軸方向に変位可能なアクチュエータ３８２と、前記成形スペースに溶融熱可塑性プラスチック材料が充填されると、前記アクチュエータと協働して前記医療バレルの前記内壁内に前記バイパス溝を形成する型押し部材３８６とを含む、射出成形装置。【選択図】図９