Demolding Moment Calculation for Injected Parts with Internal Trapezoidal Thread

Simion Haragâş; Iuliu Negrean; Dumitru Pop; Ovidiu Buiga; Florina Rusu

doi:10.4028/www.scientific.net/KEM.699.104

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 699Demolding Moment Calculation for Injected Parts...

Demolding Moment Calculation for Injected Parts with Internal Trapezoidal Thread

Abstract:

At the final step of the injection process (of a plastic product with cavities) when the part is on the point to be ejected the adhesion phenomena occurs between the core and the plastic part. The mold adhesion effect has a significant influence on the mold design ejection system and over the whole process. This paper presents a computation methodology of the demolding moment for two cases of plastic injected parts with internal trapezoidal thread. Knowing the value of this moment offer us the possibility to adopt the right design solution of the ejector system and of the entire mold. As further work the author will try to validate this method through a set of practical experiments.

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Periodical:

Key Engineering Materials (Volume 699)

Pages:

104-109

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.699.104

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Online since:

July 2016

Authors:

Simion Haragâş*, Iuliu Negrean, Dumitru Pop, Ovidiu Buiga, Florina Rusu

Keywords:

Demolding Moment, Injected Part, Trapezoidal Thread

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