| 摘要 |
PURPOSE:To eliminate the need for heating facilities by cooling and caking resin after a shaping plate which corresponds to the groove shape of a spiral groove and rotate synchronously with a rotary die and also independently abuts on the spiral groove while the resin is in a soft state. CONSTITUTION:The distance between the rotary die and shaping plate 38 is made constant and an internal rotary base 32 is allowed to rotate independently of an external rotary base 24 which rotates in synchronism with the rotary die. Namely, when the distance between the rotary die and shaping plate 38 is made constant, the spiral groove has a phase difference between the part right after the discharging of the rotary die and the part where the shaping plate 38 abuts on a spacer, and the part corresponding to the phase difference is absorbed by rotating the internal rotary base 32 independently. Therefore, when the spiral groove reaches the shaping plate 38, the internal rotary base 32 rotates and begins to rate almost in synchronism with the external rotary base 24 and the internal and external rotary bases 24 and 32 are coupled by a screw 46, thereby manufacturing the spacer while rotating them completely in synchronism. Consequently, the manufacture is performed before the resin is caked, so the need for heating facilities is eliminated. |
