Two-wire hot runner nozzle heater system
First Claim
Patent Images
1. A hot runner nozzle heater system comprising:
- at least one hot runner nozzle;
at least one resistive layer disposed proximate the runner nozzle, the resistive layer having sufficient temperature coefficient of resistance characteristics such that the resistive layer is a heater element and a temperature sensor;
two electrical lead wires connected to the resistive layer; and
a two-wire controller connected to the resistive layer through the two electrical lead wires, wherein the two-wire controller determines temperature of the heater system using the resistance of the resistive layer and controls heater system temperature accordingly through the two electrical lead wires, wherein the heater system provides heat to the at least one hot runner nozzle.
2 Assignments
0 Petitions
Accused Products
Abstract
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.
-
Citations
20 Claims
-
1. A hot runner nozzle heater system comprising:
-
at least one hot runner nozzle;
at least one resistive layer disposed proximate the runner nozzle, the resistive layer having sufficient temperature coefficient of resistance characteristics such that the resistive layer is a heater element and a temperature sensor;
two electrical lead wires connected to the resistive layer; and
a two-wire controller connected to the resistive layer through the two electrical lead wires, wherein the two-wire controller determines temperature of the heater system using the resistance of the resistive layer and controls heater system temperature accordingly through the two electrical lead wires, wherein the heater system provides heat to the at least one hot runner nozzle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A hot runner nozzle heater system comprising:
-
at least one hot runner nozzle;
a substrate disposed proximate the hot runner nozzle;
a dielectric layer disposed on the substrate;
a resistive layer disposed on the dielectric layer, the resistive layer having sufficient temperature coefficient of resistance characteristics such that the resistive layer is a heater element and a temperature sensor;
a protective layer formed over the resistive layer;
two electrical lead wires connected to the resistive layer; and
a two-wire controller connected to the resistive layer through the two lead wires, wherein the two-wire controller determines temperature of the heater system using the resistance of the resistive layer and controls heater system temperature accordingly through the two electrical lead wires, wherein the heater system provides heat to the at least one hot runner nozzle.
-
-
14. A hot runner nozzle heater system for use with an existing temperature controller having at least one temperature sensor input and a power output, the improvement comprising:
-
at least one layered heater, the layered heater comprising at least one resistive layer, the resistive layer having sufficient temperature coefficient of resistance characteristics such that the resistive layer is a heater element and a temperature sensor; and
at least one two-wire module connected to the layered heater and to the temperature controller, wherein the two-wire module determines temperature of the layered heater using the resistance of the resistive layer and transmits the temperature of the layered heater to the temperature controller input, and the temperature controller transmits the power output to the two-wire module.
-
-
15. A hot runner nozzle heater system comprising:
-
a layered heater comprising at least one resistive layer, the resistive layer having sufficient temperature coefficient of resistance characteristics such that the resistive layer is a heater element and a temperature sensor;
an electrical lead connected to the resistive layer;
a controller connected to the resistive layer through the electrical lead, wherein the controller determines temperature of the layered heater using the resistance of the resistive layer and controls heater temperature accordingly;
a common return device connected to the layered heater; and
a power source connected to the controller, wherein the common return device provides an electrical return to the controller from the layered heater.
-
-
16. A method of operating a layered heater in conjunction with a hot runner nozzle system comprising the steps of:
-
placing a substrate proximate a part to be heated;
supplying power to the layered heater through two electrical lead wires to a resistive layer of the layered heater;
transferring heat from the resistive layer, through a dielectric layer of the layered heater, and to the substrate; and
calculating the temperature of the resistive layer using a two-wire controller connected to the layered heater through the two electrical lead wires, wherein the resistive layer is a heater element and a temperature sensor. - View Dependent Claims (17, 18, 19, 20)
-
Specification