Analysis for optimal gate design of thin-walled injection molding

Shen, Yung Kang; Wu, Chih Wei; Yu, Ya Feng; Chung, Hung Wei

doi:10.1016/j.icheatmasstransfer.2008.01.014

Cited by 34 publications

(21 citation statements)

References 6 publications

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“…Common efforts to reduce material costs and increase productivity (parts per hour) include reducing the thickness of parts [1][2][3][4] and using low-cost materials, such as lignocellulosic fillers [5][6][7][8][9][10], to replace fiber glass fillers in thermoplastic composites.…”

Section: Introductionmentioning

confidence: 99%

Shrinkages and warpage in the processability of wood-filled polypropylene composite thin-walled parts formed by injection molding

Azaman

Sapuan

Sulaiman

et al. 2013

Materials & Design (1980-2015)

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a b s t r a c tReducing volumetric shrinkages and warpage during the injection molding process is a challenging problem in the production of molded thin-walled parts. In this study, the injection molding of shallow, thinwalled parts (thickness 0.7 mm), composed of lignocellulosic polymer composites (polypropylene (PP) + 50 wt% wood), was simulated. The volumetric shrinkages and warpage in the thin-walled parts were evaluated under different process conditions, with varying post-filling parameters, such as mold temperature, cooling time, packing pressure and packing time. The analysis showed that the cooling time and packing time had less of an effect on the shrinkage and warpage; nevertheless the optimal levels for both parameters are required in the molding process for the thin-walled part to achieve the best results. The volumetric shrinkage was lower near the gate than at the end-of-fill location along the flow path. The results also showed that the volumetric shrinkage correlates with the warpage measured on the molded part. The optimum parameters ranges is 40-45°C for the mold temperature; 20-30 s for cooling time; 0.85 from injection pressure (P inject ) for packing pressure; and 15-20 s for the packing time to achieve the best results with the least amount of volumetric shrinkage and warpage.

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Section: Introductionmentioning

confidence: 99%

Shrinkages and warpage in the processability of wood-filled polypropylene composite thin-walled parts formed by injection molding

Azaman

Sapuan

Sulaiman

et al. 2013

Materials & Design (1980-2015)

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show abstract

“…The above Table highlights the importance of selection of parameters and the significance of their optimum levels to achieve a robust process or parameter design [1][2][3][4][5][6][7][8][9]. The parameters like screw stroke, injection temperature have been found out less important and nozzle temperature has been substituted for barrel temperature.…”

Section: Table No 1 Parameters Considered By Various Authors For Promentioning

confidence: 99%

Parameter Optimization of Injection Molding of Polypropylene by using Taguchi Methodology

Kavade¹,

Kadam²

2012

IOSRJMCE

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“…In fact, it is relate to the melt flow in mould, temperature distribution, stress concentration, and so on. Injection molding have three principal steps, including filling, packing, and cooling of the polymer [3]. Every step directly affects the quality of the molded part.…”

Section: Introductionmentioning

confidence: 99%

Design and Process Optimization of Polymer Filling for Electronic Key Shell Based on Numerical Analysis

Niu¹

2017

dtetr

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Abstract. The electronic key is widely used in our life due to its small volume, tempting color, beautiful shape and easily portability. In order to shorten the design cycle and reduce the test cost of mold for the shells of electronic key, the work should be done firstly to analyze the injection technique. The electronic key shell is analyzed by using Finite Element Method (FEM) to judge reliability of the structure. Static structural and explicit dynamics analysis are conducted. The results provide valuable reference for the structural optimization design. Injection moulding process of the shell is simulated by applying Moldflow. Results show that the shrinkage is too small, the average value 0.12 mm and maximum value 0.497mm, to neglect the negative effect on forming parts after the injection. Furthermore, the designed mold structure was reasonable, which meet the demand of injection practically.

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Analysis for optimal gate design of thin-walled injection molding

Cited by 34 publications

References 6 publications

Shrinkages and warpage in the processability of wood-filled polypropylene composite thin-walled parts formed by injection molding

Shrinkages and warpage in the processability of wood-filled polypropylene composite thin-walled parts formed by injection molding

Parameter Optimization of Injection Molding of Polypropylene by using Taguchi Methodology

Design and Process Optimization of Polymer Filling for Electronic Key Shell Based on Numerical Analysis

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