| 摘要 |
A highly reliable molding architecture which includes a two-zoned hot sprue bushing with an interchangeable tip for use in controlling the temperature of plasticized material while it flows from the injection nozzle to the gates of a cavity mold for fabricating flat, thin objects such as compact discs and the like. Advantageously, the hot sprue bushing is adjustable in length so that it can be used with a full range of standard or custom mold plate thicknesses or other required lengths, and the interchangeable tip does not require separate heating and temperature control. With the system and its hot sprue delivery system, compact disc defect levels and scrap losses are reduced.
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