| 摘要 |
PURPOSE:To eliminate mixing of retention resin into a cavity at the time of a color change of the resin, by a method wherein a low-voltage.multi-current is supplied from both ends of the rear part of a slotted nozzle through a secondary side and fine powdery new ceramics is made to adhere closely to the whole of the external circumference of a cone and the nozzle through spray coating. CONSTITUTION:A slotted state groove 2 is provided on a cone and cylinder in a longitudinal direction of a nozzle by leaving a part of a gate part 1 in a control and cylindrical shape, a low-voltage.multi-current is made to generate on a secondary side from a root 3 of the right and the left of the nozzle through a transformer, both ends 3 of the slotted nozzle are made to electrify through a lead wire 6, and heating based on an electric resistor is made to generate on the tip of the conical gate part. Fine powdery new ceramics 4 is made to adhere closely on the whole of the surface of the gate and the nozzle through high-temperature spray coating and sealing and the outside of the slotted part are made to isolate from each other. With this construction, as the whole of the cone and cylinder are heated the whole of resin passing through the inside can be made to melt and as the inside of a passage of the resin is in a cavernous state a device which may become a cause of retention is not available through which a color change of the resin can be performed easily. Then a primary side voltage current is made to change, temperature control of the molten resin becomes possible and the temperature of the resin can be controlled and managed. |
