Injection molding apparatus with heated mold cavities

An injection molding apparatus for the manufacture of moldable articles comprising:

• an injection manifold having at least one manifold input melt channel and a plurality of manifold output melt channels, the manifold being heated by at least one manifold heater controlled by at least one manifold thermocouple,
• a plurality of hot runner nozzles coupled to the manifold;
• a first nozzle heater and a first nozzle thermocouple secured to each hot runner nozzle;
• a plurality of mold cavities positioned to receive molten material from the plurality of hot runner nozzles, each mold cavity having at least one mold gate orifice having in particular a third axis, the mold cavity including a mold core and a mold cavity wall, where an outer surface of the mold core and the mold cavity wall define the mold cavity space that is formed in a mold closed position to receive molten material;
• a mold cavity heater surrounding each mold cavity or/and mold core at least partially;
• a thermocouple associated with the mold cavity to measure directly or indirectly a temperature generated by the mold cavity heater and/or by the mold core heater;
• and
• a controller linked to the first nozzle thermocouple and to the first nozzle heater and further linked to the mold cavity heater and to the mold cavity thermocouple, wherein an activation of the mold heater and a deactivation of the mold heater during an injection cycle or any change in the temperature provided by the mold cavity heater is performed individually between each mold cavity in correlation with the quality information for each molded part as ejected from a corresponding mold cavity at the end of an each injection cycle and wherein the temperature of each nozzle heater can be further adjusted based on the temperature measured by the mold cavity thermocouple and or a thermocouple corresponding a mold core heater.