1
|
|
2
|
Moritzer E, Seidel S. Numerical Analysis and Evaluation of Process and Geometry Specific Transient Temperature Fields for a New Variation of Gas-Assisted Injection Molding. INT POLYM PROC 2015. [DOI: 10.3139/217.3010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
Two-Stage GITBlow, a special injection molding process developed by Polymer Processing Paderborn, combines the advantages of gas-assisted injection molding and blow molding. This is achieved by producing a preform with gas-assisted injection molding, which is then inflated into a larger cavity in the same mold. The inflation behavior is heavily influenced by the temperature distribution over the cross section of the preform. The preform is not rotationally symmetric and features functional geometries that are not inflated during the second process stage. Therefore, the temperature development during the first stage, i.e. the gas-assisted injection molding, as well as cooling and handling of the preform, is essential for the subsequent inflation. If certain thermal conditions are met, inflation and the creation of a homogeneous wall thickness is improved. The development of the necessary temperature profiles for homogeneous inflation is heavily dependent on the geometry of the gas chamber. Due to the preform's geometry, characteristic material accumulations are formed during the gas injection. These create local temperature hotspots that act as heat sources during the temperature equalization before inflation starts. Simulations were conducted to predict the gas chamber geometry and its influence on the temperature distribution and development during the process. The combination of two different simulation approaches creates a new method to analyze GITBlow and similar processes. Simulation results were verified with extensive experimental studies.
Collapse
Affiliation(s)
- E. Moritzer
- Polymer Processing Institute , University of Paderborn, Paderborn , Germany
| | - S. Seidel
- Polymer Processing Institute , University of Paderborn, Paderborn , Germany
| |
Collapse
|
3
|
|
4
|
Haagh GAAV, Peters GWM, Meijer HEH. Reaction injection molding: Analyzing the filling stage of a complex product with a highly viscous thermoset. POLYM ENG SCI 2004. [DOI: 10.1002/pen.10658] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
5
|
Debbaut B, Homerin O, Jivraj N. A comparison between experiments and predictions for the blow molding of an industrial part. POLYM ENG SCI 2004. [DOI: 10.1002/pen.11575] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
6
|
|
7
|
Verhoyen O, Dupret F, Legras R. Isothermal and non-isothermal crystallization kinetics of polyethylene terephthalate: Mathematical modeling and experimental measurement. POLYM ENG SCI 2004. [DOI: 10.1002/pen.10330] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
8
|
Kabanemi KK, Vaillancourt H, Wang H, Salloum G. Residual stresses, shrinkage, and warpage of complex injection molded products: Numerical simulation and experimental validation. POLYM ENG SCI 2004. [DOI: 10.1002/pen.10162] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
9
|
|
10
|
|