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公开(公告)号：US11890796B2
公开(公告)日：2024-02-06
申请号：US16924111
申请日：2020-07-08
发明人： Hozumi Yoda , Atsushi Murata , Satoshi Hoshino
CPC分类号： B29C45/68 , B29C33/24 , B29C45/7653 , B29C2045/686 , B29C2045/688
摘要： In a mold clamping apparatus, a mold clamping mechanism is provided with a half nut, and a tie bar is provided with circumferential groove configured to meshed with the teeth of the half nut. A strong-force mold opening mechanism that opens molds at an initial stage of mold opening extends across a space separating a movable platen and the mold clamping mechanism and is connected to the movable platen and the mold clamping mechanism. The strong-force mold opening mechanism is set so as to have greater axial force and shorter stroke than those of a mold opening and closing mechanism. A control unit controls opening and closing of the half nut, controls the strong-force mold opening mechanism and controls the position of the half nut in such a way that the half nut is synchronized with the circumferential groove by the strong-force mold opening mechanism.
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公开(公告)号：US11712829B2
公开(公告)日：2023-08-01
申请号：US16924120
申请日：2020-07-08
CPC分类号： B29C45/68 , B29C2045/686
摘要： An injection molding apparatus has a mold clamping device that includes a traction platen disposed below a pressure-receiving platen, a movable platen disposed above the pressure-receiving platen and configured to be moved up and down by a mold opening and closing mechanism, and tie bars extending downward from the movable platen and penetrating the pressure-receiving platen and the traction platen. The mold clamping device is configured to clamp molds disposed between the pressure-receiving platen and the movable platen. Each tie bar has a tooth portion at its lower end that engages with a tooth portion of a half nut connected to an underside of the traction plate. An injection device arranged on the movable platen includes a heating cylinder having a screw for feeding resin material through a nozzle to an upper one of the molds, and a purging cover encloses a space between the lower end portion of the heating cylinder and the movable platen.
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公开(公告)号：US09724862B2
公开(公告)日：2017-08-08
申请号：US15245436
申请日：2016-08-24
CPC分类号： B29C45/67 , B29C45/1747 , B29C45/1751 , B29C45/6721 , B29C45/6728
摘要： A mold clamping apparatus includes a fixed platen, a mold clamping cylinder, a movable platen moved by the mold clamping cylinder toward the fixed platen, and a mold opening/closing actuator for moving the movable platen or the mold clamping cylinder. The mold clamping apparatus further includes a mold thickness adjustment cylinder provided between the mold clamping cylinder and the movable platen, the mold thickness adjustment cylinder being configured to generate an axial force larger than an axial force in an expanding direction of the mold opening/closing actuator and smaller than an axial force in a contracting direction of the mold clamping cylinder.
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公开(公告)号：US11117300B2
公开(公告)日：2021-09-14
申请号：US16826112
申请日：2020-03-20
发明人： Hozumi Yoda , Satoshi Hoshino , Hiroo Okubo , Atsushi Murata , Keiichi Tozawa
摘要： A mold clamping device includes a base, a stationary platen fixed to the base and supporting a stationary mold, a movable platen movable on the base and supporting a movable mold, and a mold clamping mechanism for clamping the movable mold against the stationary mold. Tie bars extend from the stationary platen completely through both the movable platen and the mold clamping mechanism. A shaft supporting plate is fixed to the ends of the tie bars and terminates at its lower end portion in two spaced-apart shoes that have flat bottom surfaces in direct sliding contact with the base. The flat bottom surface of each shoe has a larger area than the cross-sectional area of the shaft supporting plate situated vertically above the shoe.
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公开(公告)号：US09738021B2
公开(公告)日：2017-08-22
申请号：US14933072
申请日：2015-11-05
发明人： Hozumi Yoda
CPC分类号： B29C45/6728 , B29C45/1744 , B29C45/1747 , B29C45/1761
摘要： A horizontal mold clamping mechanism includes a rail disposed on a base, a slider fitted with the rail, and a pedestal placed on the slider and provided with a sub-slider guided by a sub-rail. A fixed platen secured to the base supports a fixed mold. A mold clamping cylinder is secured to the pedestal and laid parallel to the fixed platen. A mold opening/closing actuator connects to the pedestal for moving the mold clamping cylinder. A movable platen is secured to the sub-slider and disposed between the fixed platen and the clamping cylinder. A tie-bar passes through the movable platen and the clamping cylinder, and a first linking mechanism selectively links the clamping cylinder to the tie-bar. The movable platen has a through-hole with a diameter greater than an outer diameter of the tie-bar to provide a clearance preventing slide-contact between the tie-bar and an inner surface of the through-hole.
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公开(公告)号：US20240342958A1
公开(公告)日：2024-10-17
申请号：US18633605
申请日：2024-04-12
发明人： Hozumi Yoda , Kazuo Anzai , Haruo Ogiwara
IPC分类号： B29B9/12 , B29B9/06 , B29C45/00 , B29K67/00 , B29K105/00 , B29K511/14
CPC分类号： B29B9/12 , B29B9/06 , B29C45/0001 , B29K2067/046 , B29K2105/251 , B29K2511/14
摘要： An injection molding pellet is applied for injection molding. The base material of the injection molding pellet is a polylactic resin, and the polylactic resin is mixed with wood grains with a grain size that does not exceed 50 μm.
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公开(公告)号：US11958225B2
公开(公告)日：2024-04-16
申请号：US17438206
申请日：2019-12-09
发明人： Hozumi Yoda , Nobukazu Kasuga , Hirofumi Murata
CPC分类号： B29C45/77 , B29C45/04 , B29C45/67 , B29C45/7653 , B29C45/766 , B29C45/768 , B29C2945/76083 , B29C2945/76096 , B29C2945/76254 , B29C2945/76498 , B29C2945/76505 , B29C2945/76595 , B29C2945/76709 , B29C2945/76732
摘要： A molding injection pressure and a molding clamping force are determined in advance to obtain a parting opening amount, which is a predetermined gap, between a movable mold and a fixed mold of a mold during injection filling. The molding injection pressure and the molding clamping force are determined to obtain a molding injection pressure capable of molding a good product and a mold clamping force capable of molding a good product, respectively, thereby setting a specific molding condition, setting a fast injection speed from the start of injection, which is higher than the injection speed set by the specific molding condition, and setting a fast injection section for continuing the fast injection speed as a fast injection condition, mold-clamping the mold by the molding clamping force during molding, and setting the molding injection pressure to a limit pressure, injecting and filling resin into a mold by the fast injection condition from the start of injection, and injecting and filling resin by the specific molding condition when the fast injection section ends.
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公开(公告)号：US11607831B2
公开(公告)日：2023-03-21
申请号：US17266767
申请日：2019-03-28
发明人： Yuichi Sakurada , Nanae Naito , Keita Arai , Hozumi Yoda , Hirofumi Murata
摘要： An injection device has a screw disposed in a heating cylinder so as to be rotatable and movable in an axial direction. An injection stage supports the heating cylinder. A material supplying unit supplies a resin material to the heating cylinder. A material introducing member is disposed between the material supplying unit and the heating cylinder and introduces the resin material from the material supplying unit to the heating cylinder, The material introducing member has a cylindrical portion fitted in a vertical hole provided in the injection stage, and a lower part of the cylindrical portion is in abutting contact with the heating cylinder. A heat medium passage extends inside a sidewall of the cylindrical portion for flowing therethrough a temperature-controlled heat medium, and a heat-insulating air space is formed between an outer circumferential surface of the cylindrical portion and a circumferential surface of the vertical hole.
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公开(公告)号：US11338488B2
公开(公告)日：2022-05-24
申请号：US17134229
申请日：2020-12-25
发明人： Hozumi Yoda , Satoshi Hoshino , Hiroo Okubo , Atsushi Murata , Keiichi Tozawa
摘要： A mold clamping device includes a base, a stationary platen fixed to the base and supporting a stationary mold, a movable platen movable on the base and supporting a movable mold, and a mold clamping mechanism for clamping the movable mold against the stationary mold. Tie bars extend from the stationary platen completely through both the movable platen and the mold clamping mechanism. A shaft supporting plate is fixed to the base and has openings through which the tie bars slidably extend for supporting the tie bars. The shaft supporting plate terminates at its lower end portion in two spaced-apart shoes that are fixed to the base. The bottom surface of each shoe has a larger area than the cross-sectional area of the shaft supporting plate situated vertically above the shoe.
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