Ferndale, Mich. — Hot-runner supplier Synventive has introduced the third generation of its Synflow technology, designed to give molders more control over plastic flow and to solve common defect problems on large parts like automotive instrument panels.
With Synflow3, injection molders can slow the opening of the pin in a hot runner for a set distance and hold at that position until closing, or alternate different moves within a cycle.
According to Peabody, Mass.-based Synventive, the technology helps molders eliminate cosmetic defects on sequentially filled parts caused by sudden flow front accelerations and stagnations created when the delayed pins open.
Giving molders better control of the pin allows for individual flow rate control of each nozzle to balance family molds or fill complex multi-gated geometries.
Synventive introduced and demonstrated the technology at a Nov. 30 event in the Detroit suburb of Ferndale, which was attended by molders, toolmakers and automakers.
Synventive officials touted the easy-to-use control interface, and the ability to upgrade to the system less expensively than other pin-control technologies.
"During mold sampling, if it is determined through a brief trial that synflow would benefit the process, the technology can be installed and running in a matter of minutes," the company said in a news release. "All Synventive valve-gated hot runners can come standard with SVG+, which includes position sensors that allows for the simple upgrade."
Synventive is part of Briston, Conn.-based Barnes Group Inc.