2013
DOI: 10.3139/217.2792
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The Effects of Processing Parameters on the Residual Wall Thickness Distribution at the Sharp Angle Corner of Water Assisted Injection Molded Parts

Abstract: Water-assisted injection molding (WAIM) has been widely used for tubular plastic parts due to its advantages of relatively low cost and fast cycling time. However, the non-uniform distribution of the wall thickness, especially at the sharp corner, is still a basic problem in the WAIM process. This work presents the effects of sharp corner angles on wall thickness distribution in sections near corners for various processing conditions of the WAIM process, including melt temperature, mold temperature, water dela… Show more

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Cited by 6 publications
(5 citation statements)
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“…Liu et al [1][2][3] studied the stability of water penetrating polymer melts based on pure resin in different flow channels and found that water penetrating stability is greater in conical flow channels than in planar flow channels; moreover, water has better penetration stability than gas. In addition to the study of the water penetration stability, the influence of molding process parameters [4][5][6][7][8][9][10][11] on the pipe hole length, pipe thickness, and uniformity was also studied. Meanwhile, in studying the influence of processing parameters on water penetration behavior, Johnson et al [12] used ultrasonic sensors to theoretically estimate the pipe thickness, and the data obtained were found to match the actual measurements.…”
Section: Introductionmentioning
confidence: 99%
“…Liu et al [1][2][3] studied the stability of water penetrating polymer melts based on pure resin in different flow channels and found that water penetrating stability is greater in conical flow channels than in planar flow channels; moreover, water has better penetration stability than gas. In addition to the study of the water penetration stability, the influence of molding process parameters [4][5][6][7][8][9][10][11] on the pipe hole length, pipe thickness, and uniformity was also studied. Meanwhile, in studying the influence of processing parameters on water penetration behavior, Johnson et al [12] used ultrasonic sensors to theoretically estimate the pipe thickness, and the data obtained were found to match the actual measurements.…”
Section: Introductionmentioning
confidence: 99%
“…The process is displayed in Figure 1B. In contrast, the short‐shot method has higher requirements on process control than the overflow method, but has better performance in reducing material, energy consumption, and equipment loss 4–8 …”
Section: Introductionmentioning
confidence: 99%
“…In contrast, the short-shot method has higher requirements on process control than the overflow method, but has better performance in reducing material, energy consumption, and equipment loss. [4][5][6][7][8] Considering that FAIM process has an excellent performance for plastic pipe fittings, numerous scholars have carried out related studies. [9][10][11] Liu et al 12,13 studied the influence of mold design and process parameters on the nonuniformity of wall thickness of headlight lampshade parts through simulation and experiment.…”
Section: Introductionmentioning
confidence: 99%
“…Great attention has been paid to the RWT which is an important indicator for assessing the quality of overflow water-assisted injection molded parts [5][6][7][8][9]. e experiments and simulations indicated that the distribution of the RWT was uneven in OWAIM.…”
Section: Introductionmentioning
confidence: 99%