| 摘要 |
two pairs of drive sprockets(22) oppositely positioned at the inlet and outlet of the device; a pair of chain conveyors(24) wound on the drive sprockets(22) and having a connecting part(24a) on each of their links, a series of bottom plates(26), each of which is connected to opposite connecting parts(24a) of the links; side wall members(28) pivotally connected to the sides of each bottom plate to form a unit mould transversely; and end pieces(30, 30') connected to the sides of each bottom plate(26) to form a transverse unit mould and to resiliently contact the ends of each unit mould.
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