MANUFACTURING METHOD OF FIBER REINFORCED PLASTIC AND FIBER REINFORCED PLASTIC

• Main Authors: ADACHI KENTARO, MATSUTANI HIROAKI
• Format: Patent
• Language: English; Japanese
• Published: 17.06.2021
• 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 molded product having a small fiber disorder and a good appearance quality even if it has a complicated shape by using a prepreg material that can obtain high mechanical properties.SOLUTION: In a manufacturing method of a fiber reinforced plastic molded product in which a prepreg laminate consisting of a continuous fiber prepreg composed of a reinforcing fiber and a resin aligned in one direction and a cut prepreg having a notch that divides the reinforcing fiber contained in the continuous fiber prepreg on an entire surface is press-molded into a three-dimensional shape partitioned by a molding surface of an upper mold and a molding surface of a lower mold by a press mold having the upper mold and the lower mold, the continuous fiber prepreg is arranged on at least one outermost layer of the prepreg laminate, at least one of a ratio CU of an area of an upper surface of the prepreg laminate to a surface area of the molding surface of the upper mold excluding a side surface or a ratio CL of an area of a lower surface of the prepreg laminate to a surface area of the molding surface of the lower mold excluding a side surface is 99% or less.SELECTED DRAWING: None 【課題】高い力学特性が得られるプリプレグ材料を用いて、複雑形状であっても繊維乱れが小さく外観品位の良い成形品を提供する。【解決手段】一方向に引き揃えられた強化繊維と樹脂とからなる連続繊維プリプレグと、連続繊維プリプレグに含まれる強化繊維を分断する切込を全面に有する切込プリプレグとからなるプリプレグ積層体を、上型及び下型を有するプレス金型により、前記上型の成型面および前記下型の成形面により区画される３次元形状にプレス成形する繊維強化プラスチック成形体の製造方法であって、前記プリプレグ積層体の、少なくとも一方の最表層に連続繊維プリプレグが配置されており、前記上型の成形面の、側面を除く表面積に対する前記プリプレグ積層体の上面の面積の比率CU、または前記下型の成形面の、側面を除く表面積に対する前記プリプレグ積層体の下面の面積の比率CL、の少なくとも一方を９９％以下とする、繊維強化プラスチックの製造方法。【選択図】なし