VALVE GATE SYSTEM

• Main Authors: INOUE SATORU, OZUNO MASAMI, MORIMITSU SHIGEO, KAWAHARA KEIJI, ENOKIDA SHINYA
• Format: Patent
• Language: English; Japanese
• Published: 09.09.2021
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; 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 a valve gate system having a simple structure and causing no enlargement of a mold device.SOLUTION: A valve gate system 30 comprises a gate member 31 formed with a molding material passage 32 for circulating a molten resin molding material and a valve pin 37 for opening/closing the downstream edge of the molding material passage 32. The valve gate system 30 comprises a servo motor 33, a cam operational shaft 34 having an engagement part 34a projecting axially outwards, connected to the rotary shaft 33a of the servo motor 33 and rotating around the shaft, a cam member 35 having a spiral cam groove 35a engaged with the engagement part 34a of the cam operational shaft 34 at the circumferential wall part, arranged in a state where a cylindrical shaft lies on the elongation of the central shaft of the valve pin 37, connected with the valve pin 37 and moving in a cylindrical shaft direction in accordance with the rotation of the cam operational shaft 34 and a housing 36 storing the cam operational shaft 34 and the cam member 35.SELECTED DRAWING: Figure 3 【課題】構成が簡単で、金型装置を大型化することのないバルブゲートシステムを得る。【解決手段】溶融樹脂成形材料を流通させる成形材料通路３２が形成されたゲート部材３１と、成形材料通路３２の下流端を開閉するバルブピン３７とを有するバルブゲートシステム３０において、サーボモータ３３と、軸の径外方に突出した係合部３４ａを有し、サーボモータ３３の回転軸３３ａに連結して軸周りに回転するカム操作軸３４と、カム操作軸３４の係合部３４ａと係合する螺旋形状のカム溝３５ａを周壁部に有し、バルブピン３７の中心軸の延長上に筒軸が有る状態に配置されて該バルブピン３７と連結され、カム操作軸３４の回転に伴って筒軸方向に移動するカム部材３５と、カム操作軸３４およびカム部材３５を収容するハウジング３６とを設ける。【選択図】図３