Patent ID: 8965565
Filing Date: 2015-02-24
Classification: B03C,B07C,B29B,B29K,Y02W

Abstract:
1. A sorting method for plastics, comprising: a sorting step of sorting a predetermined plastic piece from a mixed plastic piece group comprising plastic pieces of a plurality of types; an identifying step of identifying the plurality of types of the plastic pieces; and a data processing step of calculating mixing rates of the plastic pieces of the plurality of types in the mixed plastic piece group based on a result obtained in the identifying step, wherein the sorting step comprises a wet specific-gravity sorting step performed by using a wet specific-gravity sorting apparatus comprising: wherein the wet specific-gravity sorting apparatus sorts the plastic pieces of the plurality of types, which are supplied into the specific gravity liquid, in accordance with the plurality of types by utilizing differences in specific gravity between the plurality of types of the plastic pieces, and wherein the wet specific-gravity sorting step comprises controlling, based on the mixing rates of the plastic pieces of the plurality of types, which are calculated in the data processing step, at least one of: