Fast cavity surface temperature evolution in injection molding: control of cooling stage and final morphology analysis. Issue 101 (18th October 2016)

• Record Type: Journal Article
• Authors: Liparoti, Sara; Sorrentino, Andrea; Titomanlio, Giuseppe
• Is Part Of: RSC advances. Volume 6:Issue 101(2016)
• Page Start: 99274
• Page End: 99281
• Publication Date: 2016-10-18
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra22968a
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : New isotropic morphologies are obtained by controlling pressure and temperature evolution. Abstract : Fast mold surface temperature evolution in injection molding improves the surface finishing and replicability of the molded parts, and may significantly reduce frozen-in orientation. In this paper the effect of a fast control of cavity surface temperature evolution on the morphology and processing conditions of iPP molded parts has been characterized. Phenomena not previously encountered, such as a double pressure packing step when the cavity surface heating lasts longer than the packing step, have been pointed out. Significant effects on the samples frozen-in orientation have been observed by optical microscopy and confirmed by X-ray analysis. AFM analysis shows that it is possible to achieve isotropic morphology with cavity surface temperature kept constant at 150 °C for a long heating time and low holding pressure.