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  • The Effect of Process Characteristics on Metal Fill and Defect Formation in Aluminum Lost Foam castings
    The process used to make the foam patterns generally involves two steps. The first step is pre-expansion in which the raw polystyrene beads are expanded to the desired bulk density. The expansion is accomplished by either heating the beads in vacuum, or by applying steam to obtain the desired
  • Case History: New Feeders Boost EPS Production and Efficiency at Bandex
    of the processing system. But the feeders had a problem. They failed when polystyrene pellets lodged between the discs and the discharge. This had two effects: 1) lost production because of downtime for repairs; and 2) lost production because of poor product quality (inconsistencies in the foam sheet).
  • Dielectric Materials for Use in Radomes
    a range of applied microwave frequencies without significant heat loss. When compared to data from other commonly used materials (see Chart 1), such as aliphatic polymers polyethylene (PE) and polypropylene (PP), polystyrene (PS), rubber, and plywood, LAST-A-FOAM (R) products have a comparable loss

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