| 摘要 |
The invention relates to a method and a mould for producing a concrete pipe (1) which comprises a basic body (2) made of concrete and a plastic inner pipe (3) and which is intended for conducting a liquid. The method comprises the steps of introducing a mould core (4) into the plastic inner pipe (3), introducing the plastic inner pipe (3) into an outer mould (5) and pouring concrete into an intermediate space between the outer mould (5) and plastic inner pipe (3) in order to form the basic body (2), wherein, after the concrete has solidified, the plastic inner pipe (3) remains as inner formwork in the basic body (2) made of concrete and the mould body (4) is removed after the concrete has solidified, and wherein the plastic inner pipe (3) comprises an inner section (3c) and, at both ends, respective widened sections (3a, 3b) which have a larger cross section than the inner section (3c). According to the invention, the mould core (4) is adapted to the shape of the plastic inner pipe (3) in such a way that an inner section of the mould core (4) substantially has a cross section corresponding to the cross section of the inner section (3c) of the plastic inner pipe (3), and the outer sections of the mould core (4) substantially have a cross section corresponding to the cross sections of the widened sections (3a, 3b) at the ends of the plastic inner pipe (3). The mould core (4) is formed in at least two parts. |
