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Two-speed sequential valve gating
Synventive Molding Solutions (Peabody, MA) has released its SynFlow two-speed sequential valve gating hot runner technology, which is intended to solve surface defect problems on large parts and provide optimized plastic flow control in what the company says is an industry first.
PlasticsToday Staff
June 26, 2013
1 Min Read
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Synventive Molding Solutions (Peabody, MA) has released its SynFlow two-speed sequential valve gating hot runner technology, which is intended to solve surface defect problems on large parts and provide optimized plastic flow control in what the company says is an industry first.
The patent-pending pin control technology is intended for cascade or sequential valve gated hot runner systems. It works by slowing the opening speed of the valve pin, which prevents a rush of pressurized plastic. The valve pin then opens at maximum speed for the remainder of the stroke to fill the part.
The result, according to Synventive, is "a smoother fill, reducing hesitations and sharp velocity changes, resulting in cleaner parts with excellent surface quality and improved process efficiency."
Among the defects addressed are:
Pressure alteration marks
Opposite direct gating marks
Sink marks after coating
Reduced adhesion of finishes
Each SynFlow system includes:
Hydraulic valve gate hot runner system with 12-, 16-, or 22mm diameter nozzles and actuators with position sensors.
SynFlow flow control package including valve gates, signal lines for both valve control and position sensors, control unit for up to eight control zones, and hydraulic valve block.
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