| 摘要 |
PROBLEM TO BE SOLVED: To facilitate the rearranging work or maintenance work of a hopper for supplying a second raw material or an injection single pipe, to minimize the required space of an extruder to be arranged and to dispense with a surplus maintenance space. SOLUTION: An extruder is provided with a plurality of second raw material supply ports for supplying a separate raw material or injecting a solvent in a screw shaft direction. In this case, the hopper 30 connected to the second raw material supply ports, the two-joint link mechanism 40 supporting the hopper 30 so as to make the same movable in the screw shaft direction and a moving support mechanism 50 capable of approaching and separating with respect to the second raw material supply ports when moving the two-joint link mechanism 40 and hopper 30 are provided. When the positions of the second raw material supply ports are altered, the hopper 30 is separated by the moving support mechanism 50 of a raw material supply device and subsequently moved to the positions of the second raw material supply ports to be altered in the screw shaft direction by the two-joint link mechanism 40 and allowed to approach the second raw material supply ports by the moving support mechanism 50 to be connected thereto and, as a result, work becomes easy.
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