| 摘要 |
PURPOSE:To improve sealability of a liquid carrying tank made by rotation molding or blow molding by making an inner face of a liquid inlet port of the tank and a part of an inner lid in contact with the liquid inlet port into a mold face providing sliding surfaces, having the sliding faces attached to each other and pressing the inner lid rich in flexibility further by an outer lid. CONSTITUTION:A polyethylene tank body 1 molded as a mold face with a liquid inlet port 2 finished in a sliding surface formed at the upper end at the time of rotation molding can be freely engaged and removed and is rich in flexibility, wherein an outer peripheral face and a lower face are finished in sliding surfaces molded as mold face similarly at the time of molding and an inner lid 3 mainly made of polyethylene having a U-shaped cross section is provided. An outer lid 4 entirely formed as a hollow and also with upper and lower parts partially coupled is further fitted into the inner lid 3 which has been fitted into the liquid inlet port 2. An inner face of the liquid inlet port 2 and an outer face of the inner lid 3 are attached to each other on their sliding faces and the outer lid 4 is further fitted, so that the inner lid 3 is pressed by the outer lid 4, further securing sealing between them. |
