| 摘要 |
PROBLEM TO BE SOLVED: To prevent clogging of the tip of a spray nozzle for a die with a mold-release agent. SOLUTION: Using a cylinder means installed in a middle of a circulation pipeline connecting a spray nozzle with a spraying agent tank and a water tank and divided into sections by a piston, while a spraying agent being sucked to one divided section of the cylinder means, water is sucked to the other divided section from the water tank. While the extruding speed of the cylinder means being changed and adjusted in the middle of the movement in the spraying route of the spray nozzles relative to a die, the spraying amount of water is at first controlled to spray water to the die to cool the die temperature to a prescribed temperature and then while the extruding speed of the cylinder means being changed and adjusted in the opposed direction to the control direction for the water spraying amount, the spraying amount of the spraying agent is controlled to successively spray the spraying agent to the die and on completion of the spraying, the connection is switched again to water, the spray nozzle tip part is washed.
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