METHOD FOR MANUFACTURING RESIN MOLDED PRODUCT

• Main Authors: ARAI TAKESHI, SAITO TAKASHIGE, YAMAOKA TADASHI, KOIKE HARUHISA, GOTO MASAMI
• Format: Patent
• Language: English
• Published: 17.10.2013
• 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

PROBLEM TO BE SOLVED: To provide a method for manufacturing a resin molded product which suppresses the form of an insertion article being specified while suppressing the generation of burr, and the damage being generated in the insertion article.SOLUTION: A method for manufacturing a resin molded product includes a preparation process for preparing a mold having a cavity (43), a communication hole (44) and an injection hole (45), an arrangement process for arranging a part of an insertion member to the cavity by arranging the insertion member (20) to the communication hole, and an injection process for injecting a melted mold resin (30) from the injection hole into the cavity after the arrangement process. In the arrangement process, a gap which communicates the cavity and the exterior is constituted between the wall face of the mold constituting the communication hole and the insertion member. In the injection process, a control medium (CM) whose temperature is lower than that of the mold during the injection process and whose pressure is higher than the atmospheric pressure is injected into the cavity through the gap until the cavity is filled with the melted mold resin.