CROWN, EXTRUDER WITH CROWN, AND PRODUCTION METHOD OF RESIN PELLET

• Main Authors: KOBAYASHI NAOAKI, TAKEUCHI TAKASUE
• Format: Patent
• Language: English; Japanese
• Published: 11.01.2018
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; MAKING GRANULES OR PREFORMS; PERFORMING OPERATIONS; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

PROBLEM TO BE SOLVED: To provide a production method of a resin pellet, which more homogenizes a flow rate distribution in a channel width direction y with a simple structure.SOLUTION: A crown 7 is located between a die of a resin extruder and a die holder holding the die. The crown 7 has an internal channel 8 that connects a resin output port of the die holder with a resin inlet port of the die. The internal channel 8 includes an inlet section 81 connected to the resin outlet port of the die holder, an outlet section 85 connected to the resin inlet port of the die, and a squeezing section 83 located between the inlet section 81 and the outlet section 85. The squeezing section 83 has a channel height smaller than these of the inlet section 81 and the outlet section 85, and a channel length along a channel direction x of the resin is different from the channel length along the channel width direction y.SELECTED DRAWING: Figure 3 【課題】簡単な構造で、流路幅方向ｙの流量分布をより均一化する。【解決手段】クラウン７は、樹脂の押出機のダイと、ダイを保持するダイホルダとの間に位置している。クラウン７は、ダイホルダの樹脂出口部をダイの樹脂入口部に接続する内部流路８を有する。内部流路８は、ダイホルダの樹脂出口部に接続される入口区間８１と、ダイの樹脂入口部に接続される出口区間８５と、入口区間８１と出口区間８５との間に位置する絞り区間８３と、を有している。絞り区間８３は流路高さが入口区間８１及び出口区間８５より小さく、樹脂の流路方向ｘに沿った流路長さが流路幅方向ｙで異なる。【選択図】図３