SPECIFIC GRAVITY FRACTIONATION DEVICE FOR RESIN AND SPECIFIC GRAVITY FRACTIONATION METHOD FOR RESIN

• Main Author: KINUGAWA MASARU
• Format: Patent
• Language: English; Japanese
• Published: 31.10.2019
• Subjects: MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLIDMATERIALS OR FLUIDS; PERFORMING OPERATIONS; SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS; SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS; TRANSPORTING

To provide a specific gravity fractionation device for resin and a specific gravity fractionation method for resin which always performs precisely fractionation even when rate of resin pieces of large specific weight and resin pieces of small specific weight is fluctuated with respect to the resin pieces different in specific weight supplied to a tank.SOLUTION: A specific gravity fractionation device 1 for resin includes a detection device 11 for detecting a height of a first interface which exhibits an upper surface of a layer M2 of resin pieces having small specific weight located on the upper side of a height of a tank 2, of the resin pieces different in specific weight supplied into the tank 2, and a detection device 12 for detecting a height of a second interface which exhibits an upper surface of a layer M3 of resin pieces having large specific weight located on the lower side of the height of the tank 2, of resin pieces different in specific weight. A control device 13 controls at least one in a drive amount of a driving motor 15, a discharge amount of resin pieces of large specific weight by means of a rotary valve 3 provided on a discharge port Em2 of the lower side of the tank 2 and supply speed of mixed resin pieces by means of a mixed resin pieces of supply device 4 based on positional information from a position sensor 16 and detection results of the detection devices 11, 12.SELECTED DRAWING: Figure 1 【課題】槽に投入される比重の異なる樹脂片について、比重が大きい樹脂片と比重が小さい樹脂片との比率が変動しても、常に精度良く分別を実施する。【解決手段】樹脂用比重分別装置１は、槽２内に投入された比重の異なる樹脂片のうちの槽２の高さの上側に位置される比重の小さい樹脂片の層Ｍ２の上面を示す第１界面の高さを検出する検出装置１１と、比重の異なる樹脂片のうちの槽２の高さの下側に位置される比重の大きい樹脂片の層Ｍ３の上面を示す第２界面の高さを検出する検出装置１２と、を有する。制御装置１３は、位置センサ１６からの位置情報と検出装置１１、１２の検出結果とに基づいて、駆動モータ１５の駆動量と、槽２の下方側の排出口Ｅｍ２に設けられたロータリーバルブ３による比重の大きい樹脂片の排出量と、混合樹脂片投入装置４による混合樹脂片の投入速度と、における少なくとも一つを制御する。【選択図】図１