Mold filling computer simulation

A complete mold-filling computer simulations requires the calculations of the velocity and temperature profiles throughout the flow region, including the position and shape of the advancing melt front in the cavity. 

Fig. 13.42 Simulation results of the RIM process involving a linear step polymerization T0 = Tw = 60°C, kf— 0.5L/moles, t(lii = 2.4 s. (a) Conversion contours at the time of fill, (h) Temperature contours at the time of fill. [Reprinted hy permission from J. D. Domine and C. G. Gogos, Computer Simulations of Injection Molding of a Reactive Linear Condensation Polymer, paper presented at the Society of Plastics Engineers, 34th Armu. Tech. Conf, Atlantic City, NJ, 1976. (Also published in the Polym. Eng. Sci., 20, 847-858 (1980) volume honoring Prof. B. Maxwell).]...

In the 1970s, attention turned to simulation of injection molding of thermoplastics, with the first papers concerned with either isothermal mold filling [R8, W8] or nonisothermal filling very simple molds [Kl]. From the late 1970s, commercial computer software for simulating nonisothermal injection... 

Ke Twords computer aided engineering (CAE), computer simulation, fiber orientation prediction, fiber orientation modelling, fiber reinforced thermoplastics, finite difference method, finite element method (FEM), flow, glass fiber reinforcement, injection molding, mold filling analysis, warpage. 

Apparatus for the measurement of this property according to DIN 53464 [24] is available from ATS FAAR (Table 4.1). Bertacchi and coworkers [26] reported computer-simulated mold shrinkage studies on talc-filled polypropylene, glass-reinforced polyamide, and a polycarbonate-acrylonitrile butadiene styrene blend. 

Kamal, M.R., Chu, E., Lafleur, P.G., and Ryan, M.E. (1986) Computer simulation of injection mold filling for viscoelastic melts with fountain flow. Polym. Eng. Sci., 26, 190-196. 

Kamal, M. R., E. Chu, P. G. Lafleur, and M. E. Ryan, Computer Simulation of Injection Mold Filling for Viscoelastic Melts with Fountain Flow, Polym. Eng. Set, 26, 190-196, 1986. 

Overall Flow-Pattern Simulation (a) Develop a computer model to simulate, with the FAN3 method, the filling of a shallow mold, assuming constant gate pressure, isothermal flow, and incompressible Newtonian fluid, (b) Simulate the filling of the mold in Fig. 13.8, Case 1, identify the shape of the advancing front at various times, and the location and shape of the weld lines. 

Bergan PG, Felippa CA (1985) A triangular membrane element with rotational degrees of freedom. Comput Meth in Appl Mech Eng 50 25-69 Berger JL, Gogos CG (1973) A Numerical simulation of the cavity filling process with PVC in injection molding. Polym Eng Sci 13 102-112... 

Pig. 6. Filling of a double-gated injection mold with polypropylene, (a) Experiment using a series of short shots and (b) simulation. -I-I-I-I-I-I—I- = Computed weld line. Reproduced from Ref. 28. Courtesy of Elsevier Science Publishers. 

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