Plastics Engineering - May 2014 - (Page 44)
Core Shift During Mold-Filling Simulation ______________________
wall thickness to 0.08-0.12 mm would be clearly unacceptable. thus, the correct specification of one-sided constraints
is essential for a correct core-shift analysis.
Conclusions
A working algorithm for considering one-sided constraints of
cores and inserts during mold filling analysis was presented.
One-sided constraints significantly affect predictions of core
shift, even for the cases very similar to two-sided constraints.
References
1.
Figure 9: Simulation results for the one-sided constraints
with a gap (from top): final deformation of the core; thickness of the moldings, injection side; thickness of the moldings, opposite side; and warpage of the moldings
44
shepard, t. A., O'connell, M., Powell, K., and charwinsky, s. "Minimizing coreshift in injection Molded containers," Plastics
Engineering, 52, 2, 27-29 (1996).
2. shepard, t. A., O'connell M., Powell, K., and charwinsky, s.
"Mechanism for core shift in injection Moulded containers," Proceedings of Medical Design & Manufacturing, p.107-113 (1995).
3. Overbeeke, J., "High speed injection," SPE ANTEC Proceedings, 2,
557-562 (1993).
4. Dagniaux s. D. J., "tool Design for injection Moulding of
Polypropylene thin-Walled containers," SPE ANTEC Proceedings, 290-293 (1979).
5. rose, g. E., "core-shift, coupling Moldflow and ABAQUs," Moldflow User group, podium presentation (2003).
6. Hunkar, n. J., and Watkins, B. H., "Preform core transducer,"
High Performance Blow Molding conference proceedings,
117-128 (1995).
7. leo, V. and cuvelliez, c., "Effect Of Packing Parameters, gate
geometry And Mould Elasticity On the Final Dimensions of a
Moulded Part," Polymer Eng. Sci., 36, 1961-1971 (1996).
8. Baaijens, F.P.t., "calculation of residual stresses in injection
Molded Products," Rheol Acta, 30, 284-299 (1991).
9. Bakharev, A., Fan, Z., costa, F., Han, s., Jin, X., and Kennedy, P.
"Prediction of core shift Effects Using Mold Filling simulation,"
SPE ANTEC Proceedings (2004).
10. Kennedy, P. Flow Analysis of Injection Molds, Hanser Publishers
(1995).
11. talwar, K., costa, F, rajupalem, V., Antanovski, l. and Friedl, c.
"three Dimensional simulation of Plastic injection Molding," SPE
ANTEC Proceedings, 1, 563-566 (1998).
| PlAstics EnginEEring | MAY 2014 | www.4spe.org | www.plasticsengineering.org
http://www.4spe.org
http://www.plasticsengineering.org
Plastics Engineering - May 2014
Table of Contents for the Digital Edition of Plastics Engineering - May 2014
Contents
Plastics Engineering - May 2014 - Cover1
Plastics Engineering - May 2014 - Cover2
Plastics Engineering - May 2014 - Contents
Plastics Engineering - May 2014 - 2
Plastics Engineering - May 2014 - 3
Plastics Engineering - May 2014 - 4
Plastics Engineering - May 2014 - 5
Plastics Engineering - May 2014 - 6
Plastics Engineering - May 2014 - 7
Plastics Engineering - May 2014 - 8
Plastics Engineering - May 2014 - 9
Plastics Engineering - May 2014 - 10
Plastics Engineering - May 2014 - 11
Plastics Engineering - May 2014 - 12
Plastics Engineering - May 2014 - 13
Plastics Engineering - May 2014 - 14
Plastics Engineering - May 2014 - 15
Plastics Engineering - May 2014 - 16
Plastics Engineering - May 2014 - 17
Plastics Engineering - May 2014 - 18
Plastics Engineering - May 2014 - 19
Plastics Engineering - May 2014 - 20
Plastics Engineering - May 2014 - 21
Plastics Engineering - May 2014 - 22
Plastics Engineering - May 2014 - 23
Plastics Engineering - May 2014 - 24
Plastics Engineering - May 2014 - 25
Plastics Engineering - May 2014 - 26
Plastics Engineering - May 2014 - 27
Plastics Engineering - May 2014 - 28
Plastics Engineering - May 2014 - 29
Plastics Engineering - May 2014 - 30
Plastics Engineering - May 2014 - 31
Plastics Engineering - May 2014 - 32
Plastics Engineering - May 2014 - 33
Plastics Engineering - May 2014 - 34
Plastics Engineering - May 2014 - 35
Plastics Engineering - May 2014 - 36
Plastics Engineering - May 2014 - 37
Plastics Engineering - May 2014 - 38
Plastics Engineering - May 2014 - 39
Plastics Engineering - May 2014 - 40
Plastics Engineering - May 2014 - 41
Plastics Engineering - May 2014 - 42
Plastics Engineering - May 2014 - 43
Plastics Engineering - May 2014 - 44
Plastics Engineering - May 2014 - 45
Plastics Engineering - May 2014 - 46
Plastics Engineering - May 2014 - 47
Plastics Engineering - May 2014 - 48
Plastics Engineering - May 2014 - 49
Plastics Engineering - May 2014 - 50
Plastics Engineering - May 2014 - 51
Plastics Engineering - May 2014 - 52
Plastics Engineering - May 2014 - 53
Plastics Engineering - May 2014 - 54
Plastics Engineering - May 2014 - 55
Plastics Engineering - May 2014 - 56
Plastics Engineering - May 2014 - 57
Plastics Engineering - May 2014 - 58
Plastics Engineering - May 2014 - 59
Plastics Engineering - May 2014 - 60
Plastics Engineering - May 2014 - 61
Plastics Engineering - May 2014 - 62
Plastics Engineering - May 2014 - 63
Plastics Engineering - May 2014 - 64
Plastics Engineering - May 2014 - 65
Plastics Engineering - May 2014 - 66
Plastics Engineering - May 2014 - 67
Plastics Engineering - May 2014 - 68
Plastics Engineering - May 2014 - Cover3
Plastics Engineering - May 2014 - Cover4
https://www.nxtbook.com/nxtbooks/wiley/pe_201405
https://www.nxtbook.com/nxtbooks/wiley/pe_201404
https://www.nxtbook.com/nxtbooks/wiley/pe_201403_demo
https://www.nxtbook.com/nxtbooks/wiley/pe_201403
https://www.nxtbook.com/nxtbooks/wiley/antec2014_advanceprogram
https://www.nxtbook.com/nxtbooks/wiley/pe_201402
https://www.nxtbook.com/nxtbooks/wiley/pe_201401
https://www.nxtbook.com/nxtbooks/wiley/pe_201312
https://www.nxtbook.com/nxtbooks/wiley/pe_201310
https://www.nxtbook.com/nxtbooks/wiley/pe_201309
https://www.nxtbook.com/nxtbooks/wiley/pe_20130708
https://www.nxtbook.com/nxtbooks/wiley/pe_201306
https://www.nxtbook.com/nxtbooks/wiley/pe_201305
https://www.nxtbook.com/nxtbooks/wiley/pe_201304
https://www.nxtbook.com/nxtbooks/wiley/pe_201303
https://www.nxtbook.com/nxtbooks/wiley/pe_201302
https://www.nxtbook.com/nxtbooks/wiley/pe_201301
https://www.nxtbook.com/nxtbooks/wiley/pe_20121112
https://www.nxtbook.com/nxtbooks/wiley/pe_2013mediakit
https://www.nxtbook.com/nxtbooks/wiley/pe_201210
https://www.nxtbook.com/nxtbooks/wiley/pe_201209
https://www.nxtbook.com/nxtbooks/wiley/pe_20120708
https://www.nxtbook.com/nxtbooks/wiley/pe_201206
https://www.nxtbookmedia.com