Hot runners | technology
infill results in a very good thermal profile, according to Mold-Masters Regional Sales Manager Eastern US and Canada Robert Glor, who adds that, although initially targeted at the medical sector, the Summit-Series design is proving attractive to packaging moulders. Summit nozzles can also be ordered with the latest Mold-Masters servo-controlled valve-gate actuators, which allow for individual speed, time and position control of each valve pin in the mould. The Summit- Series is clean room-ready and is said to be a very good hot runner option for moulders looking to reduce risk and optimise moulding process parameters with minimised variance and strong, repeatable results.
Large part options Mold-Masters has also introduced enhanced features to its Fusion G2 series for automotive and large-part moulding. The company says an extended nozzle length range now provides more flexibility while a compound nozzle can be used to avoid interferences with cavity cooling lines and to position nozzles in tight pockets. Fusion G2 is now available with valve pin open speed control and position monitoring to enable improved gate finishes. Options for extra-extended gate seals are now also available, as are high performance water-cooled gate inserts plus some additional new polymer-specific gating options. The company has also revisited its Sprint hot runner
brand for the closure industry with a new line of colour changing tips, which are claimed to reduce colour changeover times by up to 47% compared with standard gate tips. The new tips are available as a standard package for all Sprint systems and are suitable for direct replacement of current tips. Closure production is also a target market for the
Slim-Stack compact valve gate manifold design for stack mould production. “Typically in a stack mould
www.injectionworld.com November/December 2016 | INJECTION WORLD 43
valve gate you either have to stagger the nozzles or build it up as two separate systems. What we are doing [with Slim-Stack] is use our Accu-Valve system, which has all of the actuation at the front, and put it up against a single manifold plate,” says Glor. The system can reduce the height of a stack by up to 40%, allowing moulds to be used on smaller machines in some cases. “It’s an early-on product at the moment but we have a few 32 and 48-drop stack systems in the market.” Meanwhile, the latest developments for the Dura+ hot runners for automotive lens and lighting applica- tions focus on part quality and flexibility. New angled manifold designs are claimed to make installations easier and reduce the cost of mould machining while additional gating styles and valve pins improve the flow profile for better gate quality. Also new is Velocity LS (Light Speed), a configurable 1-8 drop hot runner system built around the Master-Series nozzles. It is claimed to offer high performance and fast delivery time at competitive price. In the control sector, Mold-Masters has responded
to the growing complexity of mould designs with the introduction of the M-AX version of its TempMaster control. This combines the standard temperature control functions of the TempMaster hot runner control system with the ability to control up to eight servo- driven linear or rotary movements. The company ran a demonstration M-AX unit at K2016 driving six servos. “In the medical industry they are going away from hydraulic core pulls for a number of reasons. One, it’s cleaner, but it is also much more precise,” says Glor. The M-AX unit can control valve stems, core pulls,
coining plates, index plates, stripper plates and ejector plates as well as driving Mold-Masters technologies such as E-Drive plates and Single Electric Valve Gates (SeVG). Ewikon’s micro-manifold technology is described as a new standardised solution for production of polyolefin
Left: Summit- Series hot runners from Mold-Masters are claimed to offer four times less thermal variation than typical heater band designs
Below: Ewikon’s
micro-manifold system is
designed for
high cavitation moulding of
polyolefin parts
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