| 摘要 |
The invention relates to a method for producing prefabricated members and to a prefabricated member. Such a prefabricated member comprises at least two plates (1, 2; 6), such as a first plate, i.e. core plate (1) and a second plate, i.e. surface plate (2; 6), which have been bonded by their joint surfaces (1a, 2a; 1b, 6a). The joint surface (1a; 1b) of the first plate (1) has been equipped with a set of interconnected grooves (3, 3a, 3b; 7, 7a, 7b) forming a fluted area (4; 8). The first plate (1) comprises, at least at the stage of manufacturing the prefabricated member, an opening (5) communicating at one end with the grooves (3, 3a, 3b; 7, 7a, 7b) and at the other end with the outside of the plate (1). In the method, a glue film (11, 12) is provided on at least one of the joint surfaces (1a, 2a; 1b, 6a) of the plates, the plates (1, 2; 6) are placed with the joint surfaces (1a, 2a; 1b, 6a) facing each other, after which a vacuum is created through the opening (5) in the grooves (3, 3a, 3b; 7, 7a, 7b) and between the plates (1, 2; 6), the ambient atmospheric pressure pressing the joint surfaces (1a, 2a; 1b, 6a) of the plates against each other, the plates being bonded owing to the glue film (11, 12), after which the vacuum is released and the prefabricated member is finished. In the method in accordance with the invention, the joint surface (1a, 2a; 1b, 6a) of the plates is sealed around the fluted area (4; 8) formed by the grooves (3, 3a, 3b; 7, 7a, 7b) with a seal (10; 10a, 10b) in order to provide an at least partly hermetic barrier around the fluted area at the stage of creating the vacuum. |
