CONTROLLING METHOD FOR SCREW TYPE EXTRUSION MOLDING DEVICE FOR THERMOSETTING RESIN

PURPOSE:To obtain a molded product having a desired degree of surface roughness, by a method wherein a line speed, a discharge quantity, a number of revolutions of a screw, motor torque and temperatures each of a temperature control zone are detected respectively, through detected information of whi...

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Bibliographische Detailangaben
Hauptverfasser:	KATO NOBUKATSU, YOSHIDA MASAHITO, TSURUTA RINTAROU, ISAKI TAKEHARU, YAGI RYUZO
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS 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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Beschreibung
Zusammenfassung:	PURPOSE:To obtain a molded product having a desired degree of surface roughness, by a method wherein a line speed, a discharge quantity, a number of revolutions of a screw, motor torque and temperatures each of a temperature control zone are detected respectively, through detected information of which a theoretical value of a draw ratio is reckoned and an operation state is controlled through a mutual relation between the reckoned value and the degree of the surface roughness. CONSTITUTION:At the time of control of a screw type extrusion molding device of thermosetting resin, its line speed, discharge quantity, number of revolutions of a screw, motor torque and temperatures each of a temperature control zone are detected respectively. A theoretical value of a draw ratio is reckoned through detected information and an operating state is controlled through a mutual relation between the reckoned value and a degree of surface roughness. With this construction, a molded product having a desired degree of surface roughness and a stabilized and favorable quality can be obtained.