Batch Unit Melts, Blends With Centrifugal Force.A new high-speed mixer from Draiswerke, Inc., Mahwah, N.J., can produce PVC PVC: see polyvinyl chloride. PVC in full polyvinyl chloride Synthetic resin, an organic polymer made by treating vinyl chloride monomers with a peroxide. dry-blends and can also melt while mixing. It uses centrifugal force centrifugal force Fictitious force, peculiar to circular motion, that is equal but opposite to the centripetal force that keeps a particle on a circular path (see centripetal acceleration). to throw material against the chamber walls, where heat is generated by friction. The new Gelimat Compounder model G-HVA has higher speed and power than Draiswerke's previous Turbulent Mixer. G-HVA models range from lab size up to 20,000-lb/hr capacity. They can mix batches in 10-12 sec for nearly continuous operation. In one commercial application in Canada, an 8000-lb/hr Gelimat mixes undried wood flour Wood flour is finely pulverized wood that has a consistencey fairly equal to sand, but can vary considerably, with particles ranging in size from a fine powder to roughly the size of a grain of rice. and Polyolefins. Moisture vapor is driven out via the hopper during mixing. Hot compound can then be fed to a melt pump or short extruder or directly to a calender CALENDER. An almanac. Julius Caesar ordained that the Roman year should consist of 365 days, except every fourth year, which should contain 366, the additional day to be reckoned by counting the twenty-fourth day of February (which was the 6th of the calends of March) twice. or compression mold. |
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