| 摘要 |
PROBLEM TO BE SOLVED: To obtain a molded product having a comparatively large outer diameter while a void is less prone to be generated in the molded product, and the inner surface shape of a hollow part is made smooth by applying a centrifugal force to a reactive stock solution in order to apply specific acceleration. SOLUTION: In the condition that an acceleration of 1-5 G is applied to a reactive stock solution, the reactive stock solution containing a norbornene based monomer is reacted to be polymerized, and a pipe like molded product having at least 400 mm outer diameter is manufactured. A mold 2 has a split mold 4 capable of being split into two parts lengthwise along a split face 3, and a pair of rolling rings 8 to be fitted from an axial direction to an outer periphery at its both end parts in a state that the split molds 4 are combined. The split mold 4 is composed of, for example, an aluminum-made casting or the like, and the rolling ring 8 is composed of a cast iron or the like. It is preferable to apply a sealant of a silicone rubber or the like to the split face 3 of the split mold 4. |
