Online prediction system and method for density of powder injection molded blank
A technology of powder injection molding and prediction system, which is applied in the field of powder injection molding to achieve the effect of saving cost, improving efficiency and saving tedious labor
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[0040] Implementation examples:
[0041] Choose 316L stainless steel powder, the binder is 79% paraffin + 20% high density polyethylene + 1% stearic acid, and the powder loading is 53%. The powder and binder are mixed at 140℃-150℃ for 1.5h to obtain uniform feed.
[0042] The rectangular parallelepiped sample is injected on the injection machine, and the mold size is 28.3mm×20mm×6mm. Use the following series of parameter combinations for injection, the mold temperature is maintained at 300K; the injection temperature is between 420K and 450K, and an injection point is taken every 5K interval; the injection rate is 60cm 3 / S~90cm 3 / S, every 2cm 3 One injection point is taken at intervals of / S. A cuboid sample was injected under each set of parameters, and a total of 1×2×16=32 injections were injected to obtain 32 injection blank samples. At the same time, the temperature value T of each point inside the mold is monitored through the sensor network at the completion of each injec...
Example Embodiment
[0048] Example 1: Using mold temperature of 300K, injection temperature of 420K, injection rate of 63cm 3 / S is a set of parameters for injection, and the temperature and pressure values of each point inside the mold are monitored by the sensor network system as follows: (T1, P1) = (419.5, 81.6); (T2, P2) = (421.3, 83.5); (T3, P3) = (419.5, 81.6); (T4, P4) = (420.0, 82.8); (T5, P5) = (422.5, 84.3); (T6, P6) = (420.0, 82.8); (T7 , P7) = (418.6, 80.6); (T8, P8) = (420.2, 83.0); (T9, P9) = (418.6, 80.6)
[0049] The data obtained from the above monitoring is normalized through the man-machine interface and then input to the artificial neural network system for gray-scale prediction, and at the same time, gray-scale detection is performed on the same sample through an industrial CT machine. The predicted and detected values are listed in the table below:
[0050]
[0051] It can be seen that the predicted value of the artificial neural network system is very close to the detect...
Example Embodiment
[0052] Example 2: Using mold temperature 300K, injection temperature 422K, injection speed 75cm 3 / S is a set of parameters for injection, and the temperature and pressure values of each point inside the mold are monitored by the sensor network system as follows: (T1, P1) = (421.6, 82.2); (T2, P2) = (423.5, 84.3); (T3, P3) = (421.5, 82.2); (T4, P4) = (422.6, 83.5); (T5, P5) = (424.3, 84.8); (T6, P6) = (422.5, 83.6); (T7 , P7) = (419.8, 81.9); (T8, P8) = (421.3, 83.5); (T9, P9) = (419.8, 81.8)
[0053] The data obtained from the above monitoring is normalized through the man-machine interface and then input to the artificial neural network system for gray-scale prediction, and at the same time, gray-scale detection is performed on the same sample through an industrial CT machine. The predicted and detected values are listed in the table below:
[0054]
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