| 摘要 |
A process for manufacturing hollow handled toothbrushes is disclosed. The process includes; a) providing a toothbrush mold having a head portion, a ba se portion, a toothbrush cavity (7) located between said head and end portions (2, 3) and having walls, an injection port (6) for molten plastic, and a gas injection port (5), wherein the gas injection port (5) is positioned in the end of the base portion (3) of the mold so that gas is injected into the mol d cavity substantially centrally thereof and in a direction parallel to the longitudinal axis of the mold; b) injecting a predetermined amount of a molt en plastic into the mold cavity to partially fill the cavity; and c) injecting at least one gas through the gas injection port (5) into the cavity to direct t he molten plastic against the walls of the mold cavity.
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