Patent ID: 6104006
Filing Date: 2000-08-15
Classification: B29C,H05B

Abstract:
In a plastic-injection heating barrel of the type having:a forward end including a nozzle;a rear portion including a hopper mounting;an injecting screw housed in the barrel;an outer periphery comprising zones along a length of the barrel, the zones including a feeding zone adjacent the rear portion, an intermediate compression zone, and a metering zone adjacent the forward end;a respective thermal heater for each zone;a plurality of sensor mountings disposed along the length of the barrel, for thermally coupling the barrel to a thermal sensor; anda controller coupling the barrel to an electrical heating means for maintaining a predetermined temperature profile along the barrel, the profile being a function of thermal sensor signals;the improvement comprising:one of the zones including more than one sensor mounting;whereby the barrel is adaptable to different molding conditions.