Project Details
Abstract
This research is to develop a novel experimental set-up which allows the
measurement of 3-D temperature field in the depth of the fluid assisted injection
molding cavities throughout the molding cycles. The effects of in-mold temperature
distribution on the development of molecular structure inside molded articles will
also be investigated. In addition, the 3-D temperature measurement technique will be
applied to the molding of thermoplastic elastomers to examine the difference of gas
and water assisted injection molding cycles and their influences on the processability
of TPE material. The proposal will include a three-stage research and will be
competed in three years.
For the research of the first year, the study will attempt to develop a special
experimental set-up, which includes a fluid assisted injection mold equipped with
tubular needles for guiding embedded thermocouples, to measure the temperature
field inside the cavity. Temperature distributions in fluid assisted injection molding,
including gas and water assisted injection molding, processes will be measured and
recorded by a data acquisition system on a personal computer. The possible flow
disturbance induced by the tubular measurement device and its influence on the
accuracy of measured temperatures will be investigated. The shear heating by the
viscous dissipation in the runners and in the cavity will also be measured and
examined.
The second part of this proposal will focus on the in-mold temperature profiles
and the structural development of fluid assisted injection molded parts. The influence
of in-mold temperature distribution on the morphological properties of fluid assisted
injection molded PE/PC blends will be investigated. The effects of various processing
parameters on the in-cavity temperature distribution and the molecular orientation of
the polymeric materials in molded parts will be examined.
In the third year, the developed temperature sensor will be used to measure the
in-cavity temperature in fluid assisted injection molded thermoplastic elastomers. A
comparison will be made between gas assisted injection molding and water assisted
injection molding, to better understand the temperature profile variations as well as
their influence on the moldability of the TPE materials. The effect of various
processing parameters on the moldability of the TPE parts will also be investigated.
The final goal of this research is to develop a novel device to measure the
in-mold temperature distribution in fluid assisted injection molded parts. A precise
measurement of the in-depth temperature profile can be helpful to better understand
the molding phenomena, to validate the numerical simulation results, as well as to
optimize the parameters for the molding processes. This will provide significant
advantages in terms of reduced cycle time as well as improved products quality.
Project IDs
Project ID:PB10001-0234
External Project ID:NSC98-2221-E182-003-MY3
External Project ID:NSC98-2221-E182-003-MY3
Status | Finished |
---|---|
Effective start/end date | 01/08/11 → 31/07/12 |
Keywords
- Fluid assisted injection molding
- 3-D in-mold temperature
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