| 摘要 |
PURPOSE: A wheel made by various material having different property is provided to maximize contacting force or combining force of the wheel and to prevent a connect portion from being separated. CONSTITUTION: A fixed unit(1) having a connecting hole(1a) and a gearing groove(1b) is formed along a frame on a middle portion of a first mold(10). A connect unit(2) installed on outer frame to closely contact the first mold into a second mold(20) while the second mold is injection molded by the connecting hole, gearing groove and the connect unit. The first mole composed of polypropylene installs the fixed unit of t shape. The fixed unit forms the gearing groove from outside to inside along the first mold. Moreover, the fixed unit contains the connecting hole by penetrating. The connect unit is mounted on outmost frame portion of the first mold to apply to various shape.
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