Drainage/irrigation elements from recycled plastics

Details Drainage/irrigation elements from recycled plastics Drainage/irrigation elements from recycled plastics

2004-03-16

2009-12-29

Johnson, Christina (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

Recycling of reclaimed or purified process material

C264S037300, C264S037320, C264S140000, C264S142000, C264S152000

Reexamination Certificate

active

07638077

ABSTRACT:
A method of making drainage elements from recycled thermoplastic plastics materials comprising the steps of: providing chopped waste plastics to a screw extruder having a screw. In the extruder, the waste is compressed and delivered to a twin-plate agglomerator. One plate is closely adjacent to, and rotates with respect to, the other plate. Between the plates the waste plastics is agglomerated and the mechanical energy imparted by the extruder screw and plates heats the plastics material to about the melting point of the thermoplastic material. Hot noodles of melted plastics material extrudes from an outlet of the plates. The noodles are conveyed to a chute of a compactor funnel which has an outlet disposed closely above an output conveyor belt. The belt conveys, from the outlet of the compactor funnel, a compacted ribbon of the material at a rate such that the noodles in the funnel have a head to compact the noodles in the funnel sufficiently to bind the noodles together but not without leaving multiple spaces between them. The ribbon is cooled and chopped into bats.

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