| 摘要 |
PURPOSE:To improve the assembling accuracy of cores and the product quality by forming common holes in core prints for each core divided and joining the cores mutually by pouring hot melt adhesive into the common holes after assembling each cores. CONSTITUTION:The core 1 for cylinder head shell, etc., is composed of core constituent parts 2-7. Then, the common hole 12, 14, 16, 17, 18, 19 connecting the upper center core 7 with the other cores is formed in the core prints for each core 2-7, respectively. After assembling each core 2-7 in order of 2, 5, 4, 3, 6, 7 in succession, the hot melt adhesive is poured into the common hole 12, 14, 16, 17, 18, 19, respectively and by freezing this adhesive, the core 1 is formed for a short time. As the error for the accuracy according to clearance of the core 1 mutually disappears, the assembling accuracy of the cores 1 is improved. Further, by preventing from bulging-out of the adhesive, the product quality is improved.
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