Spray coating device in mold

The invention discloses a spray coating device in a mold. The spray coating device comprises a gas-liquid mixing system and a control circuit, wherein the gas-liquid mixing system comprises an integrated block (1), a throttling orifice, a knurling piece (2), a switch shaft (3), a nut (9) and a sealing element; the throttling orifice is used for controlling the flow rate of demolding agent mixed liquid; a plurality of gas-liquid mixing body outlets are formed in the top of the integrated block (1), and communicate with a pipeline which in oriented arrangement with spray coating dead corners in the mold; an gas-circuit electromagnetic valve (10) is arranged on a gas source pipeline; a liquid-circuit electromagnetic valve (11) is arranged on a liquid source pipeline; and the gas-circuit electromagnetic valve (10) and the liquid-circuit electromagnetic valve (11) are connected with the control circuit through conducting wires. Through the adoption of the spray coating device disclosed by the invention, oriented s