0
TECHNICAL PAPERS

Parametric Study of Heat Transfer in Injection Molding—Effect of Thermal Contact Resistance

[+] Author and Article Information
L. Sridhar, B. M. Sedlak, K. A. Narh

Department of Mechanical Engineering, New Jersey Institute of Technology, Newark, NJ 07102

J. Manuf. Sci. Eng 122(4), 698-705 (Dec 01, 1999) (8 pages) doi:10.1115/1.1287348 History: Received October 01, 1998; Revised December 01, 1999
Copyright © 2000 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
(a) Plot of the variation of gate and cavity pressure with time at a specific location in the model, for all the models under base condition (refer to Table 2). Solid lines represent the gate pressure and dashed lines represent the cavity pressure at the indicated nodes. Time refers to instant in one cycle. (b) Plot of the variation of gate and cavity pressure against normalized time (normalized with respect to cycle time). Solid lines represent the gate pressure and dashed lines represent the cavity pressure at the indicated nodes.
Grahic Jump Location
Plot of the cavity pressure against time for model A, for different processing conditions (refer to Table 2). Solid lines represent the gate pressure and dashed lines represent the cavity pressure at the indicated nodes.
Grahic Jump Location
Plot of the mid-plane deflection along “a-a,” “b-b” and “c-c” of model A(A1), B and C, respectively (see Fig. 1) due to shrinkage for analysis conditions of Tables 1 and 2.
Grahic Jump Location
(a) Formation of gap and evolution of the gap resistance plotted against the cycle time for the temperature data obtained from analysis for model A (A1). The computation is done at the node indicated on the mid-plane in Fig. 1(a). (b) Formation of gap and evolution of the gap resistance plotted against the cycle time for the temperature data obtained from analysis for model B. The computation is done at the node indicated on the mid-plane in Fig. 1(b).
Grahic Jump Location
A simulation of the part surface and mold wall showing the nonuniform gap due to superposition of mid-plane shrinkage on the thickness direction shrinkage.
Grahic Jump Location
(a) Model A: A model of an ASTM tensile test specimen showing the mid-plane mesh, cooling channels, runner and gate. For line a-a consult text under “Simulation Results/Shrinkage Analysis.” (b) Model B: A model of a box with partitions showing the runner system. For line b-b consult text under “Simulation Results/Shrinkage Analysis.” (c) Model C: A model of an electronic remote controller cover showing the runner and gate.
Grahic Jump Location
Thickness direction average temperature in models A (for two different values of part thickness) and B at a specified location, plotted at different instants in the molding cycle with the two values of TCR (Rc). Refer to Table 2 for model designations. The broken horizontal line corresponds to 110°C—a typical ejection temperature for PS. Note the differences in the cycle time for the two values of TCR used (broken vertical lines).
Grahic Jump Location
Thickness direction temperature distribution in models A at the end of filling, and at the end of postfilling, for the two values of TCR. Rc values are in m2 -K/W.

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In