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Chapter

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Title

Influence of Fill Imbalance on Pressure Drop in Injection Molding

Authors

[ 1 ] Instytut Technologii Materiałów, Wydział Budowy Maszyn i Zarządzania, Politechnika Poznańska | [ 2 ] Instytut Technologii Mechanicznej, Wydział Budowy Maszyn i Zarządzania, Politechnika Poznańska | [ D ] phd student | [ P ] employee

Scientific discipline (Law 2.0)

[2.9] Mechanical engineering

Year of publication

2019

Chapter type

chapter in monograph / paper

Publication language

english

Keywords
EN
  • injection molding
  • fill imbalance
  • cavity pressure
  • plastics
Abstract

EN During injection molding process melted polymer is introduced into mold cavity due to the pressure delivered from injection unit. Mold design principles suggests that filling of the cavity should be balanced. It means that the furthest regions of cavity (measured from injection point) should be filled at the same time to avoid problems with differential shrinkage and injection pressure drop. Fill imbalance can lead to the significant increase of pressure drop and needed clamp force, that can be compensated with more powereful injection molding machines. In this paper the relation between fill imbalance and injection pressure needed for cavity filling were investigated with Autodesk Moldflow Insight software. In this research several different shapes with thickness change of analyzed parts were performed to measure the significance of imbalance on injection pressure drop. It was found that it is possible to find a gate location even for geometrically imbalanced part, where significant pressure drop reduction can be obtained. Additionally, It was found that lowering V/P switchover point can provide significant reduction of needed injection pressure even if gate location must be placed in unfavorable location.

Pages (from - to)

548 - 556

DOI

10.1007/978-3-319-99353-9_58

URL

https://link.springer.com/chapter/10.1007/978-3-319-99353-9_58

Book

Advances in Manufacturing Engineering and Materials : Proceedings of the International Conference on Manufacturing Engineering and Materials (ICMEM 2018), 18–22 June, 2018, Nový Smokovec, Slovakia

Presented on

International Conference on Manufacturing Engineering and Materials (ICMEM 2018), 18-22.06.2018, Nový Smokovec, Slovakia

Ministry points / chapter

20

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