Synventive Molding Solutions, the hot runner maker in Peabody, Mass., said its SynFlow two-speed sequential valve gating system is available.
The technology gives molders more control over plastic flow, and solves common defect problems on large parts, such as automotive bumpers and instrument panels, such as pressure alteration marks, opposite direct gating marks, sink marks after coating and reduced adhesion of finishes.
SynFlow is a two-speed pin control system for cascade or sequential valve-gated hot runner systems. The initial opening speed of the valve pin is reduced to prevent an explosive rush of pressurized plastic. The valve pin then opens for the remainder of its stroke, at maximum speed to fill the part.
That two-speed process gives a smoother fill, reducing hesitations and sharp changes in velocity.
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