| 摘要 |
PROBLEM TO BE SOLVED: To unnecessitate complete cutting and to increase the longevity of a cutting blade in the case of crushing a fiber reinforced synthetic resin pipe by making cuts in at least one surface of the inside and outside surfaces of the fiber reinforced synthetic resin pipe and then compressing it. SOLUTION: A fiber reinforced synthetic resin duplex pipe 1 has an outside layer 11 consisting of fiber reinforced synthetic resin, an inside layer 12, and a core layer 13 consisting of resin concrete. In the case of crushing such fiber reinforced synthetic resin duplex pipe 1, first, cuts 2,... are made in the inside and outside surfaces of the fiber reinforced synthetic resin duplex pipe 1 parallel to the axial direction thereof, and furthermore, plural cuts 3,... are made in the outside surface of the fiber reinforced synthetic resin duplex pipe 1 in the peripheral direction thereof. Next, the fiber reinforced synthetic resin duplex pipe 1 in which such cuts 2,..., 3,... are made is inserted into a compressor and is compressed by a compressing bar 4, thereby it is crushed into small pieces. In this way, since the fiber reinforced synthetic resin duplex pipe 1 does not need to be completely crushed, the longevity of a cutting blade can be increased. |
