Glue supply apparatus for gypsum board, gypsum board manufacturing apparatus, and gypsum board manufacturing method

A glue supply apparatus for a gypsum board for supplying glue to a board base paper of the gypsum board, the glue supply apparatus comprising:

• a tank section configured to store the glue;
• at least one supply port disposed near an end of the board base paper of the gypsum board and configured to supply the glue;
• at least one pump section disposed on a glue supply path between the tank section and the supply port;
• and
• a controller configured to increase a supply rate at which the glue is supplied from the tank section to the supply port, when a gluing failure is detected based on a light receiving position of received light from a bonded portion side of the board base paper,
• wherein the pump section is a positive displacement pump.