Hot runner systems Mechanical stroke regulator avoids surface defects
A Mechanical Stroke Regulator (MSR) for hydraulic driven valve gate systems developed by HRS Flow Oerlikon makes it easier to individually preset the opening positions of the pins in hot runner systems.
Hot runner specialist HRS Flow offers a new mechanical stoke regulator for hydraulic valve gate systems. The solution is designed to avoid surface defects, the company states.
Via a graduate scale adjusting screw the user specifies the individual oil volume, which the valve gate system then uses to bring the needles into the intended positions. In this way, the pressure drop for each nozzle can be set independently, and the pressure distribution during the packaging phase can be controlled.
The manufacturer supplies its new MSR ready-to-install on all of the company's existing hydraulic cylinder series equipped with electrovalves. Installation can be limited to individual nozzles of a system to save costs. It takes around ten minutes and can be done without dismantling the mould. Modifications to the existing hot runner cutout are not required. Combined with Oerlikon HRS Flow's Flex speed system, the speed of the pin can also be adjusted.