| 摘要 |
PROBLEM TO BE SOLVED: To form a releasing agent layer to upgrade releasability from an inert without using an organic solvent and without influencing quality of a product on the inner surface of a cylinder liner cast into the cylinder block. SOLUTION: The cylinder liner 3 is introduced into a heating device to be preheated at a prescribed temperature, preferably at 100°C or a higher temperature and then, the inner surface of the liner is sprayed with a water soluble releasing agent using a coating device. Further, an air blowing is executed for cooling with a cooling device. By this way, the releasing agent layer 4 whose gas generating volume at the time of casting turns to zero or is restrained to a trouble-free level can be formed without causing any fluid drips or any coating unevenness even with the water soluble releasing agent. COPYRIGHT: (C)2004,JPO
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