Space-Saving Multi-Tip Hot-Runner Bushings

Two new multi-tip bushing designs that allow for very compact multi-cavity molds for small parts come from Fast Heat Inc., Elmhurst, Ill.

Two new multi-tip bushing designs that allow for very compact multi-cavity molds for small parts come from Fast Heat Inc., Elmhurst, Ill. New MT32D and MT45D bushings carry up to four tips and promise higher productivity than conventional bushings. The smaller Precision MT32D bushing is offered in a pitch range from 12 to 20 mm, depending on the number of tips. The Precision MT45D bushing comes in a pitch range from 20 to 32 mm. Tips, heaters, and thermocouples are independently replaceable. Heaters, which have a sleeve design that’s said to simplify replacement, also are claimed to deliver more uniform heat close to the gate, thus eliminating stringing.