Heat transfer analytical models for the rapid determination of cooling time in crystalline thermoplastic injection molding and experimental validation

2018 ◽  
Author(s):  
Delaunay Didier ◽  
Pignon Baptiste ◽  
Boyard Nicolas ◽  
Sobotka Vincent
Keyword(s):  
Heat Transfer ◽  
Injection Molding ◽  
Experimental Validation ◽  
Rapid Determination ◽  
Cooling Time ◽  
Analytical Models

Determination of ejection temperature and cooling time in injection molding

1992 ◽  
Vol 32 (3) ◽  
pp. 191-197 ◽  
Author(s):  
Chi J. Yu ◽  
J. E. Sunderland
Keyword(s):  
Injection Molding ◽  
Cooling Time

Determination of the Thermal Conductivity of Metal-Polymers

2019 ◽  
Vol 973 ◽  
pp. 9-14 ◽  
Author(s):  
Mikhail S. Chepchurov ◽  
Nikolay S. Lubimyi ◽  
Vladimir P. Voronenko ◽  
Daniel R. Adeniyi
Keyword(s):  
Heat Transfer ◽  
Thermal Conductivity ◽  
Heat Transfer Coefficient ◽  
Injection Molding ◽  
Transfer Coefficient ◽  
Cooling System ◽  
Using Data ◽  
Measuring Tool ◽  
The Heat Transfer Coefficient

The use of metal-polymers in the manufacture of mold-forming parts allows for the significant reduction in price and time used in manufacturing of parts. Using data on the thermal conductivity of metal-polymers in calculations of the cooling system of molds allows calculating the optimal cycle of obtaining the product. The authors propose a method of determining the coefficient of heat transfer of metal-polymers based on a die matrix, filled with aluminum. The chosen equipment or measuring tool by them, allows determining the heat transfer coefficient of the material in use. The values of the coefficient of heat transfer of the material in question, obtained in the course of the research can be use in different databases of applications used for modeling production by injection molding. The described method of determining the coefficient of heat transfer may be repeated for samples of metal-polymers.

Flame-Contact Studies

1964 ◽  
Vol 86 (3) ◽  
pp. 449-456 ◽  
Author(s):  
A. M. Stoll ◽  
M. A. Chianta ◽  
L. R. Munroe
Keyword(s):  
Heat Transfer ◽  
Thermal Properties ◽  
Heat Flow ◽  
Mathematical Analysis ◽  
Experimental Validation ◽  
Thin Layers ◽  
Thermal Properties Of Materials ◽  
Properties Of Materials

This paper is composed of three parts: 1 Apparatus and method for determination of heat transfer through fabric during flame contact; 2 experimental validation of mathematical analysis and heat flow; 3 application to determination of thermal properties of materials in thin layers.

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

1999 ◽  
Vol 122 (4) ◽  
pp. 698-705 ◽  
Author(s):  
L. Sridhar ◽  
B. M. Sedlak ◽  
K. A. Narh
Keyword(s):  
Heat Transfer ◽  
Injection Molding ◽  
Contact Resistance ◽  
Thermal Contact Resistance ◽  
Thermal Contact ◽  
Maximum Magnitude ◽  
Gap Formation ◽  
Part Surface ◽  
The One

Thermal contact resistance (TCR) plays an important role in the heat transfer during injection molding. However, there is no consensus on the magnitude of TCR to be used in simulation as most of the reported results are based on steady state experiments. A numerical simulation of the heat transfer in injection molding is used in studying its effect and significance. The TCR is shown to attain its maximum magnitude in the postfilling period, and more accurate values than those available in literature are required for a better simulation of the postfilling stage. The effect of interface gap formation between the plastic and the mold on the contact resistance is also studied. This shows that the gap may have contributed to the high magnitude of TCR reported from the one experimental study of TCR in injection molding. However, the gap formation is shown to be dependent on the part geometry as well as processing conditions—in terms of shrinkage and warpage effects. The gap is both a function of time and space (location on the part surface) and this makes any experimental determination of the gap and TCR difficult. [S1087-1357(00)01404-0]

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