Systems and Methods for Fungible Densification of Recyclable Plastics
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United States of America Patent
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Issued Date -
Jan 24, 2013
app pub date -
Jul 18, 2011
filing date -
Jul 18, 2011
priority date (Note) -
Abandoned
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Abstract
The present invention relates to a system and method for densification of recyclable plastics. The densification apparatus may include one or more hoppers for receiving plastic materials (mixed or segregated by resin identification code). After the plastic is inserted into the hopper, a shredder grinds the plastic into plastic shreds which are suitably sized for subsequent melting and compression into an ingot. The system meters the quantity of shredded plastic within the hopper for a threshold level required to generate a fungible ingot. Once that level has been reached, a conveyer may transport a set volume or weight of the plastic shreds to a compression cylinder. In the compression cylinder the plastic shreds are heated, using a heating element, to above a minimum melting temperature. In some embodiments, the minimum melting temperature is a melting temperature above a lowest melting temperature of the mixed types of plastics. The melted plastic is then simultaneously compressed via a piston into a mold for the generation of the ingot/coin.
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