| 摘要 |
PURPOSE: A multi-gun type hot melt coating device is provided to prevent degradation of product quality by preventing predetermined position of a nozzle hole from being changed according to transfiguration due to heat of a heater block. CONSTITUTION: A multi-gun type hot melt coating device comprises a heater block(30), and a plurality of spray nozzles(60) and an air supplying pipes(70,71). The heater block is manufacture by extrusion molding the aluminum into a profile shape. A plurality of heat radiating grooves(31) or heat radiation fins is formed on the outer circumference of the heater block in a longitudinal direction. A heating wire is installed inside the heater block. A plurality of injection nozzles is included in the side of the heater block and sprays the heated hot melt on a target object. The air supply pipe provides air to inside the injection nozzle and opens and closes the nozzle hole of the injection nozzle.
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