Simulation of Crystallization during Filling Stage in Injection Molding

Autor:	Hiroshi Ito, Kiyohito Koyama, Kazumi Tada, Jun-ichi Takimoto, Shin-ichi Muto
Rok vydání:	1996
Předmět:	Polypropylene Materials science Molding (process) medicine.disease_cause law.invention chemistry.chemical_compound Crystallinity Injection molding process chemistry law Mold medicine Stage (hydrology) Composite material Crystallization
Zdroj:	Seikei-Kakou. 8:675-681
ISSN:	1883-7417 0915-4027
Popis:	We have proposed a new method of calculating the crystallization process of flowing resin. A program for simulating the crystallization during the filling stage of injection molding process was developed, and applied to the molding process of polypropylene in a simple planar mold. For the case of short filling time (10s), only the resin near the surface of the mold started to crystallize during the filling stage, while for the case of long filling time (30s), crystallization started during the filling stage at all depths in the mold. For both cases, the crystallinity was highest at the melt front and lowest at the gate throughout the filling stage. For short filling time, the crystallization progressed in the packing-cooling stage, and the relative crystallinity reached 100% at the end of the cooling stage. For long filling time, however, the crystallization almost stopped during the packing-cooling stage due to high remaining pressure (about 60MPa), and the relative crystallinity did not reach 100%.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::437a0ad71d313af1e1ef2dd1b3747224 https://doi.org/10.4325/seikeikakou.8.675 Zobrazit plný text záznamu