The influence of the type of polypropylene and the length of the flow path on the structure and properties of injection molded parts with the weld lines
Artykuł w czasopiśmie
MNiSW
70
Lista 2021
| Status: | |
| Autorzy: | Bociąga Elżbieta, Kaptacz Sławomir, Duda Piotr, Rudawska Anna |
| Dyscypliny: | |
| Aby zobaczyć szczegóły należy się zalogować. | |
| Rok wydania: | 2019 |
| Wersja dokumentu: | Elektroniczna |
| Język: | angielski |
| Numer czasopisma: | 8 |
| Wolumen/Tom: | 59 |
| Strony: | 1710 - 1718 |
| Web of Science® Times Cited: | 15 |
| Scopus® Cytowania: | 14 |
| Bazy: | Web of Science | Scopus |
| Efekt badań statutowych | NIE |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | NIE |
| Abstrakty: | angielski |
| Weld lines, created in the areas of collision of twoflow fronts of plastic in the injection mold cavity, are the reason of lower mechanical properties and a worse surface condi- tion of molded parts. In the weld line area, the V-shaped notch is formed and its shape and size depend on injection molding conditions and properties of processed polymer. Addition of the foaming agent to the polymer can be one of the way to improve conditions of melt streams welding due to the higher velocity of the colliding streams of unfilled polypropylene (PP) and PPfilled with talc. The examina-tions of mechanical properties showed, however, lowertensile strength of porous parts compared to solid ones,but in the microscopic observation and measurements ofthe geometric structure of moldings, in the weld lines area,better surface conditions were achieved for samples made of the foamed polypropylene. The size of V-notch, deter- mined by the total height of the raw profile Pt, depends also on the length of polymerflow path from the gate to the weld line area. The values of Pt parameter increase withthe length of theflow path, but this increase is smallerfor foamed polypropylene. |
