Process Data Guide for Generic Materials
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Appendix C
Reference Manual
Process Data Guide for Generic Materials
The generic data presented here have been prepared from measurements made on several popular generic polymer materials typically used with C-MOLD analyses. The data has been extended to filled systems using commonly accepted rules described herein. This information is to be used for initial guesses only and results must be verified using data gathered from testing the actual material to be used in the molding process. The data presented here is utilized entirely at the user's discretion.
This information is not intended to replace actual measured data and is provided in good faith. AC Technology disclaims all warranties, express or implied, from the use of this data. AC Technology expressly disclaims all incidental and consequential damages which may arise from the use of this information.
Processing Conditions
Suggested data for the following processing conditions are included in Table C-1:
The processing temperatures and maximum injection pressure are obtained based upon average manufacturers' recommendations. These are recommended as starting points only and should be adjusted for specific applications. As observed in experiments, polymer melt flow typically turns unstable as the shear stress (shear rate) level exceeds a critical value for a given material. Thus, it is recommended that the maximum shear stress (shear rate) be maintained below the recommended value in order to avoid flow instability. During the process, the maximum shear stress (shear rate) typically occurs at the wall near the gate.
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