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FROM MASTER RHEOGRAMS TO PROCESSING PARAMETERS

Injection molding of a thermoplastic is, in essence, an operation which involves high-pressure squeezing of a polymeric melt through a very small hole (gate) [Pg.238]

Experimental observation of the variation of bX with the time tf taken to fill the mold suggests the following relationship  [Pg.241]

The cavity filling time tf for the circular disk cavity of radius is givmi by [Pg.241]

It is now assumed that isothermal flow equations can be applied using the reduced, effective cavity thickness X a so that the pressure drop frrom the center of a spreading disk flow can be written [6] [Pg.241]

Equation (8 J) is derived from the basic definitions relating pressure drop to shear stress and using the modified Ostwald-de Waale power-law model for the master rheogram given by Eq. (6.3), such that [Pg.241]

See other pages where FROM MASTER RHEOGRAMS TO PROCESSING PARAMETERS is mentioned: [Pg.238]    [Pg.243]    [Pg.245]    [Pg.251]    [Pg.255]    [Pg.257]    [Pg.261]    [Pg.263]    [Pg.265]    [Pg.269]    [Pg.271]    [Pg.275]    [Pg.281]    [Pg.283]    [Pg.285]    [Pg.287]    [Pg.289]    [Pg.291]    [Pg.293]    [Pg.295]    [Pg.297]    [Pg.305]    [Pg.307]    [Pg.309]    [Pg.311]    [Pg.238]    [Pg.239]    [Pg.241]    [Pg.243]    [Pg.245]    [Pg.247]    [Pg.249]    [Pg.251]    [Pg.255]    [Pg.259]    [Pg.261]    [Pg.263]    [Pg.265]    [Pg.267]    [Pg.269]    [Pg.271]    [Pg.273]    [Pg.275]    [Pg.277]    [Pg.279]    [Pg.283]    [Pg.285]    [Pg.289]    [Pg.291]    [Pg.295]    [Pg.297]   


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Master Rheograms

Process parameters

Processing parameters

Rheogram

Rheograms

TO parameter

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