PROBLEM TO BE SOLVED: To provide a method for efficiently producing ALC (Autoclaved Light-Weight Concrete) corner plates which is suitable for integrated production.
SOLUTION: At first, a rugged pattern 11 is formed on the surface of an ALC square bar 10. This rugged pattern is the one for giving the feeling of beauty in the appearance of ALC corner plates 12a, 12b. Next, the surface of the ALC square bar 10 with the rugged pattern 11 formed is subjected to coating treatment (stage S1). After the coating treatment, for drying a coating material applied to the ALC square bar 10, drying treatment is performed (stage S2). And, in many cases, the ALC plate 10 is overheated before the coating. In such case, cooling treatment is performed after the drying treatment (stage S3). After that, the two ALC corner plates 12a, 12b with cross-sectional L shape are cut out from the ALC square bar 10 (stage S4).
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