Flow analysis of the weld line formation during injection mold filling of thermoplastics

Rheologica Acta

Volumn 43, Issue 3, 2004, Pages 240-245

  Nguyen Chung, Tham ^a  

^a CHEMNITZ UNIVERSITY OF TECHNOLOGY   (Germany)

Author keywords

Injection molding; Polymer; Simulation; Thermoplastics; Weld line

Indexed keywords

FLOW ANALYSIS; INDUSTRIAL APPLICATION; INJECTION MOLDING; RHEOLOGY; THERMOPLASTIC;

EID: 2542525381     PISSN: 00354511     EISSN: None     Source Type: Journal    
DOI: 10.1007/s00397-003-0339-2     Document Type: Article

References (19)

1. Bird RB, Armstrong RC, Hassager O (1977) Dynamics of polymeric liquids, vol 1. Wiley, New York
2. Coyle DJ, Blake JW, Macosko CW (1987) The kinematics of fountain flow in mold filling. AlChE J 33:1168-1177
3. Criens RM, Moslé HG (1983) The influence of knit-lines on the tensile properties of injection molded parts. Polym Eng Sci 23:591-598
4. Fellahi S, Meddad A, Fisa B, Favis BD (1995) Weldlines in injection-molded parts: a review. Adv Polym Technol 14(3):169-195
5. Fluent, Inc. (1998) FIDAP 8 theory manual
6. Hagerman EM (1973) Weld-line fracture in molded parts. Plast Eng 29(10):67-69
7. Haufe A, Kühnert I, Mennig G (1999) Zum Einfluβ strömungsinduzierter Fehlerstellen auf das Versagensverhalten in spritzgegossenen Kunststoffbauteilen. Gummi Fasern Kunststoffe 52(5):354-357
8. Hirt CW, Nichols BD (1981) Volume of fluid (VOF) method for the dynamics of free boundaries. J Comput Phys 39:201-225
9. Kim S-G, Suh NP (1986) Performance prediction of weldline structure in amorphous polymers. Polym Eng Sci 26(17):1200-1206
10. Liu S-J Wu J-Y, Chang J-H (2000) An experimental matrix design to optimize the weldline strength in injection molded parts. Polym Eng Sci 40(5):1256-1262
11. Malguarnera SC, Manisali A (1981) The effects of processing parameters on the tensile properties of weld lines in injection molded thermoplastics. Polym Eng Sci 21(10):586-593
12. Mavridis H, Hrymak AN, Vlachopolos J (1988) Transient free-surface flows in injection mold filling. AlChE J 34(3):403-410
13. Nguyen-Chung T, Mennig G (2001) Non- isothermal transient flow and molecular orientation during injection mold filling. Rheol Acta 40(1):67-73
14. Nguyen-Chung T, Plichta C, Mennig G (1998) Flow disturbance in polymer melt behind an obstacle. Rheol Acta 37(3):299-305
15. Piccarolo S, Saiu M (1988) Knit-line structure in the injection molding of polystyrene. Plast Rubber Proc Appl 10:11-16
16. Seldén R (1997) Effect of processing on weld line strength in five thermoplastics. Polym Eng Sci 37(1):205-217
17. Tadmor Z (1974) Molecular orientation in injection molding. J Appl Polym Sci 18:1753-1772
18. Tomari K, Tonogai S, Harada T, Hamada H, Lee K, Morii T, Maekawa Z (1990) The V-notch at weld lines in polystyrene injection moldings. Polym Eng Sci 30(15):931
19. Wei KH, Nordberg ME III, Winter HH (1987) Simulation of planar welding flows: part 2. Strain history, stress calculation, and experimental comparison. Polym Eng Sci 27(18):1390-1398