| 摘要 |
A process is useful for manufacturing wall boards from balls of expanded glass, expanded clay, pumice granules, mica or a similar material and a foamed organic binder such as epoxide resin, PU phenol resin or the like. The binder is mixed with the balls, foamed and hardened between two die plates arranged at a distance apart to form a matrix. To obtain an extremely light but nevertheless stable wall board, a plurality of uniformly distributed recesses opening onto the outside of the board are formed in the mixture located between the two die plates while it is being compacted and before it hardens. The device used to implement the process comprises two die plates (1, 2) which can be moved towards each other in a press to compress the mixture introduced. The surface of both die plates (1, 2) is covered with a plurality of uniformly distributed, conical moulded bodies (4, 5) whose cross-section parallel to the surface of the die plate decreases in the direction of the other die plate. |
