| 摘要 |
PROBLEM TO BE SOLVED: To improve the convenience by using sinks inevitably formed on an injection-molded product in plastic chopsticks substitute for wooden or bamboo chopsticks. SOLUTION: A hexagonal shape with superior operability is adopted as the shape of this chopstick other than a tip portion 3. Its intermediate portion 2 is formed into the hexagonal shape whose ridge lines (sides) A have a clearly angular shape. The ridge line A is intentionally non-rounded so as to be most quickly hardened when cooling the die after molding, and a series of solid shaft inscribed to the side faces S is hardened later to form average sinks on the side faces S of the hexahedron. The sinks can provide the planes of the narrow-width side faces S with a stable stationary property and improve the hand-held operability. COPYRIGHT: (C)2009,JPO&INPIT
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