Importance

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Abstract

A hollow molded article is formed by laser welding a container and a lid. The container and lid are each injection molded from a material containing a thermoplastic resin and have gate marks, formed during molding. The thermoplastic resin is oriented in the flow direction in a molten state and solidified. The entire gate mark of the container is located on its outer or bottom surface, but is present in a position other than an area at two-thirds or less of the distance from the center of gravity to the outer periphery of the bottom surface. The entire gate mark of the lid is located on its upper, side, or lower surface, but is present in a position other than areas at two-thirds or less of the distances from the centers of gravity of the upper and lower surfaces of the lid to the outer peripheries of the respective surfaces.

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First Claim