| 摘要 |
To be able to manufacture a concrete pipe of high strength containing a uniform dispersion of concrete and containing a smooth inner surface able to be solidified, in a first process, by sizes of the mold(M), a certain voltage preparation position is determined and in a second process, ascent and descent actions of a vibration voltage roller stand(P) and of a guide board(G) of a vibration voltage roller front tip part(G) are synchronized and the centrifugal rotary wheels(W,W') are rotated at a specific speed. In a third process, Up and down movement motor(M2) is rotated right(descending motion) as much as a certain number, then the state is kept for a certain period of time.
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