| 摘要 |
PURPOSE:To neatly finish a urethane wheel without installing a lip by a method wherein urethane resin is poured under the condition that releasant is applied to a plurality of recessed parts, which are formed at a plurality of sites on the circumference of the part opposite to the rim of a wheel, of a resin mold and metal foils are pasted on the parts, which are opposite to the recessed parts, of the wheel. CONSTITUTION:On the disc 8 part of a wheel, a hub hole 9, mounting holes 10, a urethane inlet 11 and hand holes 12 are provided. In addition, recessed parts 13 are provided on the part of a rim 3. Under the state as mentioned above, urethane resin under molten state is poured in a cavity 5, which is formed between the disc and the rim of the wheel and a resin mold. To the hub hole 9, the mounting holes 10 and the hand holes 12, metal foils 14 are pasted from above. Further, releasant is applied in advance to the recessed parts 13. Urethane resin under molten state is poured from the urethane inlet 11 inside the wheel 2 through the pouring hole 6a of a top force 6 to the cavity 5. Since the poured resin fills the cavity 5 and excessively poured urethane resin enters the recessed parts 13, which are provided at a plurality of sites of the rim, and pouring of the resin is stopped when the resin is recognized in the recessed parts. After that, the wheel 2 is separated from a bottom force 1, the top force 6 and the resin mold 4. Finally, the metal foils 14 are removed from the wheel. |
