Study of Ceramic Injection Molding Parameters
1987; Wiley; Volume: 2; Issue: 3A Linguagem: Inglês
10.1111/j.1551-2916.1987.tb00083.x
ISSN0883-5551
Autores Tópico(s)Polymer Foaming and Composites
ResumoTo determine the parameters that most influence the injection molding process and product quality, the flow of materials from the injection cylinder to the mold cavity was investigated in the light of hold pressure and injection rate. During molding hold time, cylinder and melt temperatures were held constant. Molding trials were performed in a reciprocating screw machine. Results indicate that the cavity filling rate is determined by the injection rate rather than injection pressure, and the sample weight is influenced by the hold pressure rather than injection rate. The applied hold pressure enhances packing only prior to gate sealing; and the relative increase in mix pressure or packing during the hold pressure cycle is time-dependent. A shallow metering screw can reduce melt flow fluctuations and inhomogeneity.
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