General Aspects of Injection Molding

A general description of injection molding was given in Chapter 1. In essence, polymer pellets are plasticated in a 

Polymer Processing Principles and Design, Second Edition. Donald G. Baird and Dimitris I. ColUas. 2014 John Wiley Sons, Inc. Published 2014 by John Wiley Sons, Inc. 

FIGURE 10.1 Compression molding process for producing a panel from polypropylene and glass fiber mat composite sheets. 

FIGURE 10.3 Flow rate and pressure in the reservoir of an injection molding unit as a function of time. 

FIGURE 10.5 Flow patterns in an end-gated mold, (a) Top view of fronts as a function of time, (b) Side view of velocity profiles in the fully developed region and frontal region. (Reprinted by permission of the publisher from Tadmor and Gogos, 1979.) 

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