| 摘要 |
A method is disclosed for the manufacture of a float ( 30 ) comprising the following steps: providing a mould ( 10 ) having a first enclosure ( 12 ) opening into a second enclosure ( 14 ) of greater dimensions than the first enclosure ( 12 ), and an inlet ( 16 ) into the first enclosure ( 12 ), the first and second enclosures ( 12, 14 ) together defining the shape of the float ( 30 ); injecting a mixture comprising plastics material and blowing agent into the inlet ( 16 ), such that the mixture passes through the first enclosure ( 12 ) and then into the second enclosure ( 14 ); and causing or allowing the mixture to set, thereby forming the float ( 30 ). The float ( 30 ), the mould ( 10 ) and a fluid storage chamber ( 60 ) including the float ( 30 ) are also disclosed. |
