Article | REF: IN53 V1

Adaptive control of the thermoplastics injection process

Authors: Jean-Étienne FOURNIER, Nicolas HAVARD, Marie-France LACRAMPE, Marc RYCKEBUSCH, Patricia KRAWCZAK

Publication date: April 10, 2006

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6. Effect of advanced control systems on internal stress levels

As expected, given the longer effective holding pressure time, the polymer pressure control mode (BFP) generates a higher level of internal stress than the conventional hydraulic pressure control mode. This is evidenced by a reduction in resilience after molding (2 days after injection) (figure 10 ). Nevertheless, this degradation in impact performance remains limited (-15%) and is not modified by the use of the model.

Impact of control mode on impact strength and stability on a typical production run of PBT-injected ISO specimens
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Effect of advanced control systems on internal stress levels