公开(公告)号：US06783710B1

公开(公告)日：2004-08-31

申请号：US09082309

申请日：1998-05-20

申请人： Andreas Walder

发明人： Andreas Walder

IPC分类号： B29C4422

CPC分类号： B29C44/3461 ,  B29B9/06 ,  B29K2105/048 ,  Y10S264/13 ,  Y10S264/17

摘要： Apparatus and method for the production of expandable plastics granulate (C). A plastics melt (A′) is impregnated by a fluid blowing agent (B), which is, at an elevated pressure within a predetermined pressure range, only partly soluble in the melt. The method comprises the following steps: 1. dispersion of the blowing agent in the melt, 2. retaining of the mixture within a predetermined pressure range for a predetermined retention time, 3. cooling of the melt impregnated by the blowing agent to a temperature which is several degrees Celsius above the solidification temperature of the melt, and 4. granulating the cooled mixture.

摘要翻译： 用于生产可膨胀塑料颗粒的设备和方法（C）。 塑料熔体（A'）被流体发泡剂（B）浸渍，流体发泡剂（B）在预定压力范围内的高压下仅部分溶于熔体。 该方法包括以下步骤：1.将发泡剂分散在熔体中，2.将混合物保持在预定压力范围内预定的保留时间; 3.将由发泡剂浸渍的熔体冷却至 比熔体凝固温度高几摄氏度，和4.对冷却的混合物进行造粒。

公开(公告)号：US06716379B2

公开(公告)日：2004-04-06

申请号：US09497348

申请日：2000-02-03

申请人： Jeffrey J. Stimler ,  David P. Zettel ,  Said K. Farha

发明人： Jeffrey J. Stimler ,  David P. Zettel ,  Said K. Farha

IPC分类号： B29C4422

CPC分类号： B29C44/5636 ,  B29C44/22 ,  Y10T428/249953 ,  Y10T428/249976 ,  Y10T428/249977 ,  Y10T428/249988 ,  Y10T428/249989 ,  Y10T428/249991 ,  Y10T428/249992

摘要： A method and apparatus for making a densified skin polymer foam plank comprising providing a polymer foam having a plurality of cells and heating an outer surface of the foam at a heating station. The heating step collapses and melts the cells adjacent the outer surface to form the densified skin having a density greater than a density of the foam before the heating step. Additionally, the method and apparatus may further include extruding the polymer foam from an extruder.