Formwork for forming reentrant, has sealing part whose mechanical resistance to impact under action of a hammer and/or removable character permits to resist forty form removal operations

摘要

The formwork has a reentrant case (5) with a support side having a magnetic unit for fixation of the case on a metallic panel. A sealing part (6) is located opposite to the support side of the reentrant case. The sealing parts mechanical resistance to an impact under the action of a hammer permits to resist forty form removal operations. The resistance to the impact is about 500 joules.