FORMWORK

To provide a formwork which is easy to handle because of light weight, can improve work efficiency and allows a finished surface of a cylindrical projection to become smooth.SOLUTION: A formwork 1 includes a cylindrical member 4 made of synthetic resin, a metal ring member 5 having an annular flange part 6 which is attached to each of the upper and lower ends of the cylindrical member 4 in the axial direction and protrudes radially outward from the cylindrical member 4, and the ring member 5 is arranged along the outer peripheral surface of the cylindrical member 4. As a result, the weight of the formwork 1 as a whole can be reduced, the handling becomes better, and the work efficiency can be improved and moreover, the outer peripheral surface of the cylindrical projection after molding can be made smooth and neatly finished.SELECTED DRAWING: Figure 1 【課題】軽量化することでその取り扱いが良好となり、その作業効率を向上させることができ、しかも、円柱状突起の仕上がり面が滑らかになる型枠を提供する。【解決手段】型枠１は、合成樹脂製の円筒状部材４と、該円筒状部材４の軸方向上下端にそれぞれ装着され、該円筒状部材４から径方向外方に突設される円環状のフランジ部６を有する金属製のリング部材５と、を備え、リング部５材は、円筒状部材４の外周面に沿って配置される。これにより、型枠１全体を軽量化することができ、取り扱いが良好となり、その作業効率を向上させることができ、しかも、成型後の円柱状突起の外周面を滑らかできれいな仕上がり面とすることができる。【選択図】図１