Device for multifoaming of expandable plastics
AssigneeHirsch Maschinenbau GmbH & Co. KG.
InventorHans Reiner Stampfer
Life of this patent
Estimating the term…
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.
Claims14
A device for afterfoaming expandable plastics prefoamed in a least one prefoaming stage, comprising
- at least one storage or supply means for weighing and forwarding a predetermined quality of prefoamed expandable plastics, and
- a foaming vessel connected to said at least one storage or supply means for a discontinuous or batchwise afterfoaming of the prefoamed expandable plastics fed from said at least one storage or supply means.
A device for afterfoaming expandable plastics prefoamed in at least one prefoaming stage, comprising
- at least one storage or supply means, and
- a foaming vessel for a discontinuous or batchwise afterfoaming of the prefoamed expandable plastics,
- the foaming vessel, besides a feed opening for water vapor, a discharge duct for the foamed material and at least one offgas exhaust opening, includes a tangentially connected blow-in opening for the prefoamed expandable plastics and a sieve in an upper part of the foaming vessel.
A device for afterfoaming expandable plastics, prefoamed in at least one prefoaming stage, comprising
- at least one storage or supply means,
- a foaming vessel for a discontinuous or batchwise afterfoaming of the prefoamed expandable plastics, and
- a weighing means for the prefoamed expandable plastics being integrated in the at least one storage or supply means.
A device for afterfoaming expandable plastics, prefoamed in at least one prefoaming stage, comprising
- at least one storage or supply means,
- a foaming vessel for a discontinuous or batchwise afterfoaming of the prefoamed expandable plastics,
- a cellular wheel sluice or feeder connected to the at least one storage or supply means, and
- a blower provided for introducing the prefoamed expandable plastics into the foaming vessel.
A device for afterfoaming expandable plastics, prefoamed in at least one prefoaming stage, comprising
- at least one storage or supply means,
- a foaming vessel for a discontinuous or batchwise afterfoaming of the prefoamed expandable plastics, and
- a recycling duct for offgas drawn off the foaming vessel being connected to the foaming vessel for an at least partial recirculation of the offgas to the foaming vessel via a blower while forming a closed-loop fluid conveying circuit for the introduction of the prefoamed expandable plastics.
A device for afterfoaming expandable plastics, prefoamed in at least one prefoaming stage, comprising
- at least one storage or supply means,
- a foaming vessel for a discontinuous or batchwise afterfoaming of the prefoamed expandable plastics, and
- a filling level sensor or switch provided in the foaming vessel being adjustable in height.
Dependencies are inferred from the claim text.