Davis-Standard Extruder Has New Features

PAWCATUCK, CT | Davis-Standard announces a 3.5-in. (90-mm) extruder said to offer a new extruder frame, innovative feedscrew design, and quick screw exchange (QSE) technology. This extruder is designed for high temperature processes to 300 deg C and those requiring specialty copolymer resins for film, coating, adhesion, and molding applications. 

The Davis-Standard QSE adapter

The standardized extruder frame is built with additional space to simplify maintenance and improve heater access. Computer-designed stainless steel feedscrews are said to provide reliable melt homogeneity for resins such as acid copolymers, which improves bond performance to materials such as aluminum foil.

Other reported extruder advantages include electrical barrel heating with air-cooled blowers for each zone; temperature-controlled water cooling for gearbox oil cooler; water-cooled screw and feed section; and fixed die support and thermal expansion capability.

Company says the QSE adapter enables processors to change the screw easily without dismantling the melt pipes, feed block, and other components. An extraction tool is included to manually change the breaker plate melt-filtering inserts. The adapter is engineered with an electrical pressure gauge, manual or motorized pressure spindle, double thermocouple for every heating zone, and breaker plate with two-screen pack.

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