| 摘要 |
<p>1313203 Casting thermoplastic foam sheet DOW CHEMICAL CO 19 June 1970 [19 June 1969] 29934/70 Heading B5A [Also in Division C3] An apparatus for densifying thermoplastic resinuous foam particles comprises a conveyer having an upwardly facing conveying surface, an inlet end and a discharge end, means to vibrate the conveyer, means to supply thermoplastic resinous foam particles to the inlet end of the conveyer, a radiant heat supply disposed adjacent the conveying surface and means for cooling the conveying surface to a temperature at which sticking of heat plastified thermoplastic resinous foam particles thereto does not occur, wherein the conveying surface narrows from the inlet end to the outlet end. In Fig. 1 comminuter 11 feeds material to bin 12 having vent 13 which then feeds the particles via valve 14 to vibrating conveyer 18 (shown in Fig. 2) having cooler 23 and radiant heater 25. The coalesced foam sheet 26 passes through rolls 28 to cooler 29 and comminuter 31 to hopper 32 from which the material is fed to a heat fabricator, e.g. extruder, 33.</p> |
