COMBINED INJECTION MOLDING TYPE STAND CHAIR

摘要

The present invention relates to a combined injection molding type stand chair which is molded by a general injection molding method and to which a gas injection molding method is applied to form a pressure-resistant cavity part only at the edge part, which is a heavy wall part, by gas injection and to thereby reduce manufacturing materials and reinforce the entire strength by the pressure-resistant cavity part. The combined injection molding type stand chair according to the present invention comprises a mounting frame which is fixed to a stand; a seat part which is mounted on the mounting frame to support audience′s hips and is injection molded out of a synthetic resin material to have a heavy wall part formed along the edge and a pressure-resistant cavity part formed in the heavy wall part by gas injection during injection-molding; and a backrest part which is mounted on the mounting frame to support the audience′s back and is injection molded out of a synthetic resin material to have a heavy wall part formed along the edge and a pressure-resistant cavity part formed in the heavy wall part by gas injection during injection-molding.