| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for molding a key top in which an outer shell on which characters and patterns are printed in advance by one machine, an inner shell is injection-molded, and the inner shell and the outer shell are connected integrally and which simplifies a production process, improves productivity, and reduces production costs. SOLUTION: A thermoplastic sheet (10) on which the characters and the patterns are printed in advance is subjected to hot press molding by using the closing junction between a lower mold (100) and an upper mold (200), an outer shell (20) is formed in the lower mold (100), a recessed hole (11') is formed in the outer shell (20), the lower mold (100) in which the outer shell is retained is rotated appropriately to be closed together with the upper mold (200), an inner shell (10') is injection-molded in the hole (11') by an injection apparatus, and the inner shell (10') and the outer shell (20) are connected integrally. In this way, the key top (30) of a letter key having the characters and the patterns can be obtained.
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