摘要:
An injection molding apparatus and an method for the manufacture of moldable articles having an injection manifold, a plurality of hot runner nozzles, a first nozzle heater, a plurality of mold cavities positioned to receive molten material from the plurality of the hot runner nozzles, each mold cavity having at least one mold gate orifice and a mold cavity heater surrounding each mold cavity at least partially and a thermocouple associated with the mold cavity to measure directly or indirectly a temperature generated by the mold cavity heater.
摘要:
A heater and thermocouple assembly for use with a hot runner nozzle with an elongated heater body, said heater body having at least one first heating section, which in operation is positioned adjacent to the front end portion of the hot runner nozzle, and at least one second heating section which in operation is positioned adjacent to a nozzle head of the hot runner nozzle and has an at least partly annular distance section with a wall which is arranged between the first and second heating sections.
摘要:
A heater and thermocouple assembly for use with a hot runner nozzle with an elongated heater body, said heater body having at least one first heating section, which in operation is positioned adjacent to the front end portion of the hot runner nozzle, and at least one second heating section which in operation is positioned adjacent to a nozzle head of the hot runner nozzle and has an at least partly annular distance section with a wall which is arranged between the first and second heating sections.
摘要:
An injection molding hot runner nozzle (30) comprises a material feed pipe (32) containing at least one flow duct (40) for a fluid feed material, further a muff (10) which can be slipped onto said pipe, a heater (16) to warm said feed pipe and a temperature sensor (20). In order to very accurately detect the temperature of the fluid material passing through the feed pipe, the invention prescribes that the muff (10) be fitted with a feedthrough (24) which substantially runs radially through a wall of said muff and into which is guided a free end of the temperature sensor (20), or a temperature sensor segment (56) configured near said free end, when the muff (10) has been slipped onto the material feed pipe (32).
摘要:
The invention relates to an electric heating unit for hot runner systems, in particular for hot runner nozzles and/or hot runner manifolds, comprising at least one tubular or muff-like support made of a sintered substance and comprising at least one heating layer fitted with heating conductor tracks, where said heating layer is a fired foil or a fired thick-film paste.
摘要:
The invention relates to an injection mold's hot runner nozzle (10) of which the injection material feeding pipe (20) contains at least one flow duct (30) for a flowable/fluid material. The hot runner nozzle (10) also comprises a heater (40) heating the fluid injection material and a temperature sensor (50) mounted in fixed manner in the region of the heater (40) on said injection material pipe. By means of this configuration and the simple design of the hot runner nozzle, control and measurement of the temperature of the hot runner nozzle (10) are achieved in durable, reliable and economical manner in particular in the end zone of said pipe (20).
摘要:
An injection molding apparatus comprises a manifold having a manifold channel for receiving a melt stream of molten material under pressure and delivering the melt stream to a nozzle channel of a nozzle. A mold cavity receives the melt stream from the nozzle and the nozzle channel communicates with the mold cavity through a mold gate. A thermocouple is coupled to the mold core of the mold cavity in order to measure the temperature of the molten material in the mold cavity.
摘要:
A hot runner nozzle heater system is provided with a layered heater in communication with a two-wire controller, wherein a resistive layer of the layered heater is both a heater element and a temperature sensor. The two-wire controller thus determines temperature of the layered heater using the resistance of the resistive layer and controls heater temperature through a power source.
摘要:
A hot runner includes a manifold having a manifold channel and a plurality of nozzle coupled to the manifold. The manifold channel includes a plurality of branches and a manifold heater. Each of the plurality of nozzles includes a nozzle channel and a nozzle heater, the nozzle channel for receiving molding material from a branch of the manifold channel and delivering molding material to a mold cavity. At least one temperature sensor is located near the interface of the manifold and at least one of the nozzles. The temperature sensor is connected to a controller and the controller is connected to at least one of the nozzle heaters. The controller controls power to the nozzle heater according to a temperature measured by the temperature sensor.
摘要:
An injection molding hot runner nozzle includes a nozzle body comprising a nozzle core, a nozzle tip, and a melt passage extending through the nozzle body for conveying melt from a manifold through the nozzle tip and to a gate of a mold cavity. A cylindrical sleeve is disposed around the nozzle body, the sleeve being slidably removable from the nozzle body. A wire heating element for heating melt in the melt passage is is spirally wound about the sleeve. A temperature sensor comprising a wire is spirally wound about the sleeve.