| 摘要 |
PROBLEM TO BE SOLVED: To relatively easily and stably fill a molten resin not having excess and insufficiency in a resin passage for connecting in the case of filling the molten resin in the passages of collided parts of half-split units and connecting both. SOLUTION: In the hollow unit W made of the resin obtained by colliding half-split units WU and WL made of a synthetic resin with each other and filling the molten resin in the resin passages for connecting along a peripheral edge of the collided parts and connecting the half-split units to each other, a first excess part Ki1 formed of overflowed molten resin overflowed upon filling in the passage is connected to an outside of a weld occurring site of the passage via a first connected part Ji1 to a part corresponding to the collided part, and a second excess part Ki2 formed of the molten resin overflowed from the excess part is connected to the first excess part via a second connecting part Ji2, and these first and second excess parts are cut and removed at the first part after molding.
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