公开(公告)号：US20180001532A1

公开(公告)日：2018-01-04

申请号：US15639857

申请日：2017-06-30

Applicant: GALA INDUSTRIES, INC.

Inventor： Mark Anthony Lythgoe

IPC: B29C47/00 ,  B29C47/88 ,  B29K25/00

CPC classification number: B29C48/0022 ,  B29B9/065 ,  B29B9/12 ,  B29C44/3461 ,  B29C48/0012 ,  B29C48/04 ,  B29C48/911 ,  B29K2025/06 ,  B29K2101/12 ,  B29K2105/0005 ,  B29K2105/043 ,  B29K2105/048

Abstract: A pre-expanded hard shell thermoplastic foam pellet is made by controlling the temperature of the melt exiting a die plate in an underfluid pelletizer, and by controlling the temperature and pressures of the cooling fluid as the pellet flows from the cutting chamber through the slurry line toward a centrifugal dryer. The process and apparatus used for controlling the above parameters is described in conjunction with making the pellets. The pellets thus formed may have a generally spherical shape, or they may have odd, irregular shapes with foam hemorrhages protruding therefrom, depending on the conditions during pre-expansion.