Twin screws get internal shaft cooling.German gear manufacturer PIV PIV Particle Image Velocimetry PIV Personal Identity Verification (FIPS 201) PIV Pentium 4 PIV Peak Inverse Voltage PIV Personal Identification Verification PIV Post Indicator Valve (firefighting) Drives GmbH has been working for two years with U.S. and European makers of corotaring twin.screw extruders to develop a way to cool the scows internally through the drive shaft drive shaft also drive·shaft n. A rotating shaft that transmits mechanical power from a motor or an engine to a point or region of application. instead of the usual way through the front end of the screws. Cooling from the drive end allows melt to exit the machine along the screw axis Crystallography In crystallography, a screw axis is a symmetry operation describing how a combination of rotation about an axis and a translation parallel to that axis leaves a crystal unchanged. rather than out the bottom. Cooling through a single-screw drive shaft isn't difficult, but the drive shafts in twin-screw machines take far higher loads. PIV, which is a unit of Brevini in Italy and has an office in Vernon Hills, Ill, plans to have the first driveshaft cooling system cooling system: see air conditioning; internal-combustion engine; refrigeration. cooling system Apparatus used to keep the temperature of a structure or device from exceeding limits imposed by needs of safety and efficiency. installed at a customer for trials in April. The developmental shaft cooling system is available now for screws of 40 mm diam. and larger. Tel: (888) 2738464, www.piv-drives.com |
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