DIE FOR RUBBER EXTRUSION MOLDING, RUBBER PART FOR TIRE MOLDING AND METHOD OF PRODUCING RUBBER PART FOR TIRE MOLDING

PROBLEM TO BE SOLVED: To stabilize the state of boundary surfaces between two or more rubbers by preventing air inclusion between rubber layers effectively in integrating the rubbers and extrusion-molding the rubbers.SOLUTION: A die for rubber extrusion molding includes a pre-die 2 having a confluen...

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1. Verfasser:	ICHIYANAGI TOMOHIRO
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING PERFORMING OPERATIONS 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
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Zusammenfassung:	PROBLEM TO BE SOLVED: To stabilize the state of boundary surfaces between two or more rubbers by preventing air inclusion between rubber layers effectively in integrating the rubbers and extrusion-molding the rubbers.SOLUTION: A die for rubber extrusion molding includes a pre-die 2 having a confluent part 8 in which two or more rubbers are joined and a nozzle 4 which discharges the rubbers joined in the pre-die 2, and the pre-die 2 is provided with a passage for supplying a second rubber 11 constituting the lower surface of a molding from below to a first rubber 10 flowing in the horizontal direction. 【課題】２種類以上のゴムを合体させて押出成型する際のゴム層間のエア入りを効果的に防止して界面の状態を安定させる。【解決手段】少なくとも２種類のゴムを合流させる合流部８を有するプレダイ２と、プレダイ２内で合流されたゴムを吐出させる口金４とを備え、さらに、前記プレダイ２は、水平方向に流動する第１のゴム１０に対して、成型品の下面を構成する第２のゴム１１を下方側から供給するための通路を備えるゴム押出成型用ダイである。【選択図】図１