| 摘要 |
<p>Provided is a method for controlling the temperature of a thermoplastic resin in an injection molding machine, in which when normal operation of the injection molding machine is temporarily stopped and a control is performed to maintain the temperature of a thermoplastic resin in the heating cylinder, the control for maintaining the temperature can be performed so that no carbides are produced in the resin. When a switch is made from normal operation, in which a molded article is formed using the injection molding machine, to a control for maintaining the temperature, in order to prevent the thermoplastic resin in the heating cylinder (1) from carbonizing due to a rapid fall in temperature, a plurality of heaters (3a, 3b, 3c, 3d, 3e), the temperatures of which differ during normal operation of the injection molding machine, are cooled over a predetermined time (n × T) to a temperature maintenance limit temperature (t2) at which no carbonization occurs, and a control is performed so that the temperatures of the cooled heaters (3a, 3b, 3c, 3d, 3e) become uniform. It is thereby possible to prevent carbides from being produced in the thermoplastic resin in the heating cylinder (1).</p> |
