| 摘要 |
The invention relates to a method for evaluating a force for demoulding a tyre from a mould, which consists in measuring a demoulding force and a moulding surface of a control mould (2) and of two test specimens (3, 4), said method comprising: - a step of choosing the control mould (2), - a step of calculating the moulding surface area S1 of the control mould (2), - a step of measuring the force F1 for demoulding the control mould (2), - a step of determining a first control test specimen (3) with a moulding surface area S0, - a step of determining a second control test specimen (4) with a moulding surface area S'0, S'0 being different from S0, - a step of measuring the force F0 for demoulding the first control test specimen (3), - a step of measuring the force F'0 from demoulding the second control test specimen (4), - a step of calculating the ratio of the moulding surface area S0 of the first test specimen (3) and S'0 of the second test specimen (4) so as to define a test specimen surface ratio Rse - a step of calculating the ratio of the force F0 for demoulding the first test specimen (3) and F'0 for demoulding the second test specimen (4) so as to define a test specimen force ratio Rfe - a step of selecting a mould (8, 81, 82) to be measured, - a step of measuring the moulding surface area Sm of the mould (8, 81, 82) that is to be measured, - a step of calculating the force Fm for demoulding the mould (8, 81, 82) that is to be measured, such that Fm = F1 x Sm/S1 x Rfe/Rse. |
