CONTROLLING METHOD OF TEMPERATURE OF RESIN IN PLASTIC MOLDING MACHINE

PURPOSE:To exactly control the actual temperature of resin by a method in which the temperature of the inner surface of a cylinder is obgained from the measured temperature by a temperature sensing elements set at varying distances from the inner surface of the cylinder and then corrected from param...

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Bibliographische Detailangaben
Hauptverfasser:	SHIBUYA TOMOE, TOGAWA AKIRA, SEKINE NOBUTAKA, IWATA MITSUO, ITOU KATSUHIKO, SANO HIDEO, NAKAMOTO MITSUSACHI
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CONTROL OR REGULATING SYSTEMS IN GENERAL CONTROLLING FUNCTIONAL ELEMENTS OF SUCH SYSTEMS MAKING GRANULES OR PREFORMS MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS PERFORMING OPERATIONS PHYSICS PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS REGULATING 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 exactly control the actual temperature of resin by a method in which the temperature of the inner surface of a cylinder is obgained from the measured temperature by a temperature sensing elements set at varying distances from the inner surface of the cylinder and then corrected from parameters including the revolving number of screw and room temperature to estimate the temperature of molten resin, and on the basis of the deviation of the resin temperature from a desired temperature, the temperature of the resin is controlled. CONSTITUTION:Three temperature-measuring holes 3a-3c of different depths are drilled on the same plane in a cylinder 2, and temperature-sensing elements 4a-4c, e.g., thermocouples, etc., are inserted into the bottoms of the holes 3a-3c. A temperature distribution curve from temperatures measured by the elements 4a-4c is displayed in a quatratic curve line to obtain the temperature of the inner surface of the cylinder 2. The estimated temperature of molten resin is then calculated by selecting three or more parameters including the revolving number of screw and room temperature at least among parameters such as screw revolving number, room temperature, set temperature, screw shape, the kinds of resins, etc., to vary the temperatures of molten resin. On the basis of the deviation of the temperature from a desired temperature, the temperature of molten resin is controlled.