INJECTION MOLDING METHOD, MANUFACTURING METHOD OF MOLDING, AND MANUFACTURING METHOD OF METAL RESIN COMPOSITE

• Main Authors: KANDA TOMOMICHI, WATANABE KAZUHIRO, GIBO SHINYA
• Format: Patent
• Language: English; Japanese
• Published: 10.11.2023
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; 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 method for a resin composition containing a PAS resin and a thermoplastic elastomer, the method capable of reducing molding defects and the frequency of mold maintenance.SOLUTION: An injection molding method using an injection unit 100 provided with: a cylinder 2; a screw 3 arranged in the cylinder 2 and capable of compressing and melting, measuring, and injecting a resin supplied from a root portion; and a vent port 20 arranged midway in a longitudinal direction of the cylinder 3 comprises: a supplying step for supplying a resin composition containing a PAS resin and a thermoplastic elastomer to the cylinder 2 of the injection unit 100; a plasticizing step for keeping the cylinder 2 at 290°C or more to plasticize the resin composition in the cylinder 2; an injection step for injecting the resin composition from the cylinder 2 with the screw 3; an exhausting step for exhausting a component vaporized from the resin composition in the plasticizing step or the injection step from the vent port 20; and a molding step for molding the resin composition injected in the injection step using a mold 9.SELECTED DRAWING: Figure 1 【課題】ＰＡＳ樹脂と熱可塑性エラストマーとを含む樹脂組成物の射出成形方法において、成形不良や金型のメンテナンス頻度を低減することのできる射出成形方法を提供する。【解決手段】シリンダ２とシリンダ２内に配置され、根本部より供給される樹脂を圧縮溶融、計量及び射出できるスクリュー３とシリンダ３の長手方向の途中に配置されたベント口２０とを備えた射出ユニット１００を用いた射出成形方法において、ＰＡＳ樹脂と熱可塑性エラストマーとを含む樹脂組成物を射出ユニット１００のシリンダ２に供給する供給工程と、シリンダ２を２９０℃以上に保持してシリンダ２中で樹脂組成物を可塑化する可塑化工程と、樹脂組成物をスクリュー３でシリンダ２から射出する射出工程と、可塑化工程又は射出工程において樹脂組成物から揮発した成分をベント口２０から排出する排出工程と、射出工程において射出された樹脂組成物を金型９で成形する成形工程とを含む。【選択図】図１