Tire cure and heat transfer simulator

Apparatus for simulating the heat build-up in a running tire comprising, means to generate a first pulsed voltage signal to simulate the temperature proximate one of the internal and external surfaces of the running tire, means to generate a second pulsed voltage signal to simulate the temperature proximate an internal point of the running tire, simulation network means having at least one resistor representative of the heat conductivity parameter of the tire and at least one capacitor representative of the specific heat parameter of the tire, the length of said network means being representative of the physical dimension of the tire, said network means receiving said first and second pulsed voltage signals including said second signal being applied at an internal point in said simulation network means, said network means providing selective output signals proportional to the temperature of a selective point internally of the running tire, and means for reading out said signals proportional to the temperature of a selective point internally of the running tire.

Apparatus for use with the tire cure press for calculating the state of cure of a tire in the press in terms of equivalent cure factors, comprising, means for measuring the temperature of the internal and external surface of the tire simulator network means for obtaining a signal simulating the temperature of a selected point internally of the tire from the internal and external surface temperature of the tire, means for modifying said simulated signal to a form appropriate for exponentiation, exponential function generating means receiving the modified signal and providing an output signal which is the antilog thereof, and integrator means receiving said output signal and providing the signal proportional to an equivalent cure factor.

Apparatus for simulating the heat transfer in a tire to determine the state of cure of the tire comprising means for generating a first input voltage signal proportional to the temperature proximate the external surface of the tire, means for generating a second input voltage signal proportional to the temperature proximate the internal surface of the tire, simulation network means having at least one resistor representative of the heat conductivity parameter of the tire and at least one capacitor representative of the specific heat parameter of the tire, the length of said network means being representative of the thickness of the tire, said network means receiving said first and second input voltage signals and providing selective output signals proportional to the temperature of a selective point internally of the tire, exponential function generating means providing a signal which is an exponential function of said output signal of said network means, and integrator means receiving said exponential function signal and providing a signal proportional to an equivalent cure factor.