Resin recovery method

Patent metadata

Field	Value
Publication number	US-12420454-B2
Application number	US-202418827878-A
Country	US
Kind code	B2
Filing date	Sep 9, 2024
Priority date	Sep 13, 2023
Publication date	Sep 23, 2025
Grant date	Sep 23, 2025

Abstract

A method for recovering resin from a salvage vehicle is provided that includes the steps of: dismantling the salvage vehicle to obtain a salvage vehicle shell; shredding the salvage vehicle shell to obtain a first shredder dust; air sorting the first shredder dust to obtain first low-specific-gravity dust and first high-specific-gravity dust which is higher specific gravity than the first low-specific-gravity dust; and wet gravitational sorting the first high-specific-gravity dust, in which interior components containing fiber are removed upon dismantling the salvage vehicle, and further including steps of shredding the interior components to obtain second shredder dust; and air sorting the second shredder dust to obtain second low-specific-gravity dust and second high-specific-gravity dust which is higher specific gravity than the second low-specific-gravity dust.

First claim

What is claimed is:

1. A method for recovering a resin from a salvage vehicle, the method comprising the steps of:
dismantling the salvage vehicle to obtain a salvage vehicle shell;
shredding the salvage vehicle shell to obtain a first shredder dust;
air sorting the first shredder dust to obtain a first low-specific-gravity dust and a first high-specific-gravity dust which has a higher specific gravity than the first low-specific-gravity dust; and
wet gravitational sorting the first high-specific-gravity dust,
wherein interior components containing fiber are removed upon dismantling the salvage vehicle,
the method further comprising steps of: shredding the interior components to obtain a second shredder dust; and
air sorting the second shredder dust to obtain a second low-specific-gravity dust and a second high-specific-gravity dust which has a higher specific gravity than the second low-specific-gravity dust,
wherein an airflow upon the air sorting of the second shredder dust is greater than an airflow upon the air sorting of the first shredder dust.

2. The method for recovering a resin according to claim 1 , wherein the first high-specific-gravity dust is water gravitational sorted to obtain a dust having a specific gravity of less than 1, and a dust having a specific gravity of at least 1.

3. The method for recovering a resin according to claim 2 , wherein the dust having the specific gravity of less than 1 contains olefin resin.

4. The method for recovering a resin according to claim 1 , wherein iron is recovered by magnetic sorting of the shredded salvage vehicle shell upon obtaining the first shredder dust, and
iron is recovered by magnetic sorting of the shredded interior components upon obtaining the second shredder dust.

5. The method for recovering a resin according to claim 1 , further comprising before the wet gravitational sorting, a step of recovering a non-ferrous metal by metal sorting the first high-specific-gravity dust,
wherein the first high-specific-gravity dust that was metal sorted is wet gravitational sorted.

Assignees

• Honda Motor Co Ltd

Inventors

• KODAIRA Ryosuke
• Suzuki Yoshitaka
• Suzuki Yoichiro
• Fukunishi Kohei

Classifications

• B29B2017/0234

  using gravity, e.g. separating by weight differences in a wind sifter · CPC title

• B29B2017/0241

  in gas, e.g. air flow · CPC title

• B29B2017/0272

  Magnetic separation · CPC title

• B29B17/02 Primary

  Separating plastics from other materials · CPC title

• B29B17/0404 Primary

  to powder · CPC title