Stabilization of BMC injection molding by process control measures

Topic N, Kruppa S, Drummer D, Schiffers R (2018)

Publication Type: Conference contribution

Publication year: 2018

Publisher: Society of Plastics Engineers

Book Volume: 2018-May

Conference Proceedings Title: Annual Technical Conference - ANTEC, Conference Proceedings

Event location: Orlando, FL, USA


Polyester molding compounds form a quarter of Europe´s glass fiber reinforced plastics production. Their main applications are automotive parts such as exterior body parts and headlight reflectors. Dependent on the processing method there are two types of polyester molding compounds which mainly differ in their composition and raw material condition. For compression molding sheet molding compounds (SMC) are used, while bulk molding compounds (BMC) are processed by injection molding [1]. In comparison to SMC compression molding, BMC injection molding allows higher production rates at a better process reproducibility [2]. However, there are several effects such as material induced interferences or changing ambient conditions that cause fluctuations and lead to varying part quality [3]. The manual adaption of the relevant process setting parameters presents an option to react on such interferences and prevent further rejects. The outcome of these adjustments is dependent on the experience of the operator, since an accurate knowledge of the influence of certain setting parameters on individual part quality features is required [4]. In this paper the impact of occurring interferences on the volumetric part filling is analyzed. In order to prevent negative effects by these disturbances, two existing process control measures, which react inline on fluctuations by automatically adjusting relevant process parameters, are used and validated.

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Topic, N., Kruppa, S., Drummer, D., & Schiffers, R. (2018). Stabilization of BMC injection molding by process control measures. In Annual Technical Conference - ANTEC, Conference Proceedings. Orlando, FL, USA: Society of Plastics Engineers.


Topic, Nicolina, et al. "Stabilization of BMC injection molding by process control measures." Proceedings of the 2018 Society of Plastics Engineers Annual Technical Conference, ANTEC 2018, Orlando, FL, USA Society of Plastics Engineers, 2018.

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