1
|
Huang PW, Peng HS. Effects of high-efficiency infrared heating on fiber compatibility and weldline tensile properties of injection-molded long-glass-fiber-reinforced polyamide-66 composites. JOURNAL OF POLYMER ENGINEERING 2020. [DOI: 10.1515/polyeng-2019-0211] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractGlass fiber composites are prevalent molded materials used in various fields, including aviation engineering, automobile manufacturing, and medical equipment production. The length of a glass fiber affects the mechanical properties of a glass fiber composite. Studies have reported that breakage occurs in long fibers subjected to screw plasticization, injection processes, and geometrical changes in injection molding. Moreover, multigate injection molding can result in weldlines on the final product, consequently reducing its strength. Further exploration is required to determine how product strength is affected by weldlines generated through injection molding with glass fiber composites and how product tensile properties associated with weldlines can be improved. Therefore, this study designed a mold with a vent area and a plug-in mold-surface-heating device to examine changes in the weldlines and tensile properties of long-glass-fiber composite specimens fabricated through injection molding using two melts. The results revealed that fiber length decreased with increasing screw speed; such declines in fiber length affected the tensile strength of the long-glass-fiber-reinforced polyamide-66 composites. In addition, because the arrangement and distribution of the glass fibers were affected by the melt flow rate, melt flow direction, and changes in mold cavity volume, the weldline tensile strength varied with the depth of the vent area. Mold surface heating improved the specimen surface roughness by 5.79% and effectively improved the interfacial adhesion between the fibers and melts, thereby resulting in more favorable weldline tensile strength. This also notably reduced the depth of weldlines produced by the adhesion of two melts.
Collapse
Affiliation(s)
- Po-Wei Huang
- Program of Mechanical and Aeronautical Engineering, Feng Chia University College of Engineering and Science, Taichung 40724, Taiwan
| | - Hsin-Shu Peng
- Mechanical and Computer-Aided Engineering, Feng Chia University College of Engineering and Science, Taichung 40724, Taiwan, e-mail:
| |
Collapse
|
2
|
Yokomizo K, Banno Y, Kotaki M. Molecular dynamics study on the effect of molecular orientation on polymer welding. POLYMER 2012. [DOI: 10.1016/j.polymer.2012.07.042] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
3
|
Brucato V, Kiflie Z, La Carrubba V, Piccarolo S. The continuous cooling transformation (CCT) as a flexible tool to investigate polymer crystallization under processing conditions. ADVANCES IN POLYMER TECHNOLOGY 2009. [DOI: 10.1002/adv.20151] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
4
|
Leong YW, Umemura T, Hamada H. Film insert molding as a novel weld-line inhibition and strengthening technique. POLYM ENG SCI 2008. [DOI: 10.1002/pen.21157] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
5
|
Lim JC, Cho KY, Park JK. Weld line characteristics of PC/ABS blend. II. Effect of reactive compatibilizer. J Appl Polym Sci 2008. [DOI: 10.1002/app.27316] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
6
|
Lu C, Yu X, Guo S. The mechanism of ultrasonic improvement of weld line strength of injection molded polystyrene and polystyrene/polyethylene blend parts. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/polb.20795] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
7
|
Lu C, Yu X, Guo S. Ultrasonic improvement of weld line strength of injection-molded polystyrene and polystyrene/polyethylene blend parts. POLYM ENG SCI 2005. [DOI: 10.1002/pen.20456] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
8
|
Lu C, Guo S, Wen L, Wang J. Weld line morphology and strength of polystyrene/polyamide-6/poly(styrene-co-maleic anhydride) blends. Eur Polym J 2004. [DOI: 10.1016/j.eurpolymj.2004.06.016] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
9
|
Dairanieh IS, Haufe A, Wolf HJ, Mennig G. Computer simulation of weld lines in injection molded poly(methyl methacrylate). POLYM ENG SCI 2004. [DOI: 10.1002/pen.10600] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
10
|
Cho K, Ahn S, Park J, Park CE, An JH. Evaluation of the weld-line strength of thermoplastics by compact tension test. POLYM ENG SCI 2004. [DOI: 10.1002/pen.11766] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
11
|
A modified model predictions and experimental results of weld-line strength in injection molded PS/PMMA blends. POLYMER 2004. [DOI: 10.1016/j.polymer.2004.02.051] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
12
|
Mielewski DF, Bauer DR, Schmitz PJ, Van Oene H. Weld line morphology of injection molded polypropylene. POLYM ENG SCI 2004. [DOI: 10.1002/pen.10371] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
13
|
La Carrubba V, Brucato V, Piccarolo S. Isotactic polypropylene solidification under pressure and high cooling rates. A master curve approach. POLYM ENG SCI 2004. [DOI: 10.1002/pen.11375] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
14
|
Debondue E, Fournier JE, Lacrampe MF, Krawczak P. Weld-line sensitivity of injected amorphous polymers. J Appl Polym Sci 2004. [DOI: 10.1002/app.20488] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
15
|
Lim JC, Park JK. Weld-line characteristics of polycarbonate/acrylonitrile-butadiene-styrene blends. I. Effect of the processing temperature. J Appl Polym Sci 2004. [DOI: 10.1002/app.21218] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
16
|
La Carrubba V, Gabriëlse W, van Gurp M, Piccarolo S, Brucato V. Indentation test as a tool for monitoring the solidification process during injection molding. J Appl Polym Sci 2003. [DOI: 10.1002/app.12357] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
17
|
Brucato V, Piccarolo S, La Carrubba V. An experimental methodology to study polymer crystallization under processing conditions. The influence of high cooling rates. Chem Eng Sci 2002. [DOI: 10.1016/s0009-2509(02)00360-3] [Citation(s) in RCA: 96] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
18
|
Guo S, Ait-Kadi A. A study on weld line morphology and mechanical strength of injection molded polystyrene/poly(methyl methacrylate) blends. J Appl Polym Sci 2002. [DOI: 10.1002/app.10450] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
19
|
La Carrubba V, Brucato V, Piccarolo S. Phenomenological approach to compare the crystallization kinetics of isotactic polypropylene and polyamide-6 under pressure. ACTA ACUST UNITED AC 2001. [DOI: 10.1002/polb.10075] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
20
|
Fellahi S, Favis B, Fisa B. Morphological stability in injection-moulded high-density polyethylene/polyamide-6 blends. POLYMER 1996. [DOI: 10.1016/0032-3861(96)87620-8] [Citation(s) in RCA: 78] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
21
|
Nadkarni VM, Ayodhya SR. The influence of knit-lines on the tensile properties of fiberglass reinforced thermoplastics. POLYM ENG SCI 1993. [DOI: 10.1002/pen.760330609] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
22
|
Fisa B, Rahmani M. Weldline strength in injection molded glass fiber-reinforced polypropylene. POLYM ENG SCI 1991. [DOI: 10.1002/pen.760311807] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
23
|
Modeling of Injection Mold Post-Filling: A Review and Some Critical Problems to Solve. JOURNAL OF POLYMER ENGINEERING 1990. [DOI: 10.1515/polyeng.1990.9.4.237] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|