Study of Shrinkage of Thermoplastics in Injection Molding

Sotnik, S. V.

Публікація:
Study of Shrinkage of Thermoplastics in Injection Molding

dc.contributor.author	Sotnik, S. V.
dc.date.accessioned	2025-05-20T20:19:15Z
dc.date.available	2025-05-20T20:19:15Z
dc.date.issued	2025
dc.description.abstract	The article is devoted to problem of plastic materials deformation in process of production by injection molding. The stages of plastic processing are considered, including heating, melting, mold filling and subsequent solidification. The main types of shrinkage and key ways of measuring it are described. A series of experiments using polypropylene, high-density polyethylene and two modifications of polyvinyl chloride are carried out. The influence of processing temperature regimes and rheological characteristics of materials on final dimensional parameters of products has been investigated. Correlation dependences between coefficient of thermal expansion, range of working temperatures of mold and yield index for each type of polymer have been established. The optimum technological modes providing minimum geometrical deviations of finished parts have been revealed. The results of study can be used to improve technological processes and increase accuracy of manufacturing polymer products of complex configuration.
dc.identifier.citation	Sotnik, S. V. Study of Shrinkage of Thermoplastics in Injection Molding / S. V. Sotnik // Scientific Bulletin of Valahia University - Materials and Mechanics. – 2025. – Vol. 21. – Iss. 24. – рр. 13-17
dc.identifier.doi	https://doi.org/10.2478/bsmm-2025-0002
dc.identifier.uri	https://openarchive.nure.ua/handle/document/31240
dc.language.iso	en_US
dc.publisher	Sciendo
dc.relation.ispartofseries	21; 24
dc.subject	injection molding
dc.subject	thermoplastics
dc.subject	shrinkage factors
dc.subject	thermal expansion coefficient
dc.subject	melt flow index
dc.title	Study of Shrinkage of Thermoplastics in Injection Molding
dc.type	Article
dspace.entity.type	Publication