Abstract: A device for multifoaming expandable plastics, such as, for instance, EPS, EPE, EPP or polymer mixtures, includes at least one storage or supply assembly and a foaming vessel for the discontinuous or batchwise afterfoaming of the prefoamed expandable plastics, whereby precisely adjustable bulk densities are attainable in an afterfoaming procedure while observing tight environmental conditions.

Abstract: In a process for multifoaming expandable plastics, such as, for instance, EPS, EPE, EPP or polymer mixtures, with prefoaming being effected in a first step and afterfoaming of already prefoamed material being effected in at least one further step, it is provided that discontinuous or batchwise foaming is carried out as final afterfoaming. A device for multifoaming expandable plastics, such as, for instance, EPS, EPE, EPP or polymer mixtures, includes at least one storage or supply means and a foaming vessel for the discontinuous or batchwise afterfoaming of the prefoamed expandable plastics, whereby precisely adjustable bulk densities are attainable in an afterfoaming procedure while observing tight environmental conditions.