A process for producing a foamed material web, for example polystyrene, of constant density and thickness is disclosed as well as a tandem extruder system which is suitable for carrying out the process and has a corresponding control system. This object is achieved by a monitored feeding of the first extruder with a constant amount by weight of blowing agent and material, by a control of the screw speed of the first extruder dependent on the state of filling of its feed hopper and by monitoring and keeping constant the screw speed of the second extruder.
申请公布号
DE3316838(C2)
申请公布日期
1986.08.21
申请号
DE19833316838
申请日期
1983.05.07
申请人
HERMANN BERSTORFF MASCHINENBAU GMBH, 3000 HANNOVER, DE