A GMT charge spans about 80% of the part’s surface but layers ought not be placed side-by-side [18]. Here, two separate flow fronts will fuse together at the junction between the layers. This creates a classical weld (knit) line and produces a latent, or obvious, part defect. The defect may be in part appearance or mechanical strength. Part thickness control is through stacking of individual sheets. Molding problems include part blistering, shrinkage, and warpage.
4 in. (6 mm) [19]. Representative Conditions are presented in table 14.2. Davis et al. [12] Propose Somewhat Higher Pressures, 2000–6000 PSI (14–41 mpa) With A Cycle Tim OF 55–95 sfor SMCS, and 3000 PSI (21 MPa) Along with 120–140 ° F (50–60 ° C) for GMTS and LFTS with at Least 60–90 S Just to Preheat a GMT PRIOR to iTS Mold. Note That Table
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