Simulations on structure performance of 3C thin-wall injection-molded parts

2002 ◽  
Vol 86 (12) ◽  
pp. 3064-3071 ◽  
Author(s):  
Shia-Chung Chen ◽  
Hsing-Ling Wang ◽  
Juan-Po Chen ◽  
Hsin-Shu Peng
Keyword(s):  
Thin Wall ◽  
Molded Parts ◽  
Injection Molded ◽  
Wall Injection

Investigations on the Weldline Tensile Strength of Thin-wall Injection Molded Parts

2004 ◽  
Vol 23 (6) ◽  
pp. 575-588 ◽  
Author(s):  
Rean Der Chien ◽  
Shia-Chung Chen ◽  
Hsin-Shu Peng ◽  
Pao-Lin Su ◽  
Chun-Sheng Chen
Keyword(s):  
Tensile Strength ◽  
Thin Wall ◽  
Molded Parts ◽  
Injection Molded ◽  
Wall Injection

Investigations of the Tensile Properties on Polycarbonate Thin-Wall Injection Molded Parts

2003 ◽  
Vol 22 (5) ◽  
pp. 479-494 ◽  
Author(s):  
Shia-Chung Chen ◽  
Hsin-Shu Peng ◽  
Lei-Ti Huang ◽  
Ming-Shiu Chung
Keyword(s):  
Tensile Properties ◽  
Thin Wall ◽  
Molded Parts ◽  
Injection Molded ◽  
Wall Injection

Investigation on the weldline strength of thin-wall injection molded ABS parts

2007 ◽  
Vol 34 (4) ◽  
pp. 448-455 ◽  
Author(s):  
Chun-Sheng Chen ◽  
Tsyr-Jang Chen ◽  
Rean-Der Chien ◽  
Shia-Chung Chen
Keyword(s):  
Thin Wall ◽  
Injection Molded ◽  
Wall Injection

Correlation Between Mechanical Properties in Standard Test Specimens and Injection Molded Thin-Wall Parts

2013 ◽  
Author(s):  
Laurentiu I. Sandu ◽  
Felicia Stan ◽  
Catalin Fetecau
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Yield Strength ◽  
Injection Molding ◽  
Process Conditions ◽  
Thin Wall ◽  
Optimal Process ◽  
Melt Temperature ◽  
Molded Parts ◽  
Injection Molded

In this paper, we investigated the effect of injection molding parameters on the mechanical properties of thin-wall injection molded parts. A four-factor (melt temperature, mold temperature, injection speed and packing pressure) and three-level fractional experimental design was performed to investigate the influence of each factor on the mechanical properties and determine the optimal process conditions that maximize the mechanical properties of the part using the signal-to-noise (S/N) ratio response. The mechanical properties (e.g., elastic modulus, yield strength and strain at break) were measured by tensile tests at room temperature, at a crosshead speed of 5 mm/min, and compared with those of the injection-molded specimens. The experimental results showed that the tensile properties were highly dependent on the injection molding parameters, regardless of the type of the specimens. The values of Young modulus and yield strength of the injection-molded specimens were lower than those of the injection-molded parts, while the elongation at break was considerably lower for the injection-molded parts. The optimal process conditions were strongly dependent on the measured performance quantities (elastic modulus, yield strength and strain at break).

Injection Molding Process Parameter Optimization for Warpage Minimization Based on Moldflow

2011 ◽  
Vol 101-102 ◽  
pp. 254-257
Author(s):  
Hua Bo He ◽  
Fei Lin Wu ◽  
Yi Min Deng
Keyword(s):  
Process Parameters ◽  
Simulation Analysis ◽  
Process Parameter ◽  
Injection Molding Process ◽  
Thin Wall ◽  
Molding Process ◽  
Orthogonal Experiments ◽  
Molded Parts ◽  
Wall Injection ◽  
Moldflow Simulation

By the combination of orthogonal experiments and moldflow simulation analysis, the warpage of a thin-wall injection molded parts is analyzed under the combined effects of multi-molding process parameters. By this method, it can gain the experiment data which can basically reflect the overall situation using fewer number of simulation analysis. In addition, the effects degree of different molding process parameters for warpage are researched, and the optimized parameter combination is obtained. It can avoid the one-sidedness of individual analysis of the various factors and solve the unreasonable appearance of process parameter settings. With the help of results, it can fasten the mold developing schedule, thus shorten the cycle of product development, and improve the quality of products and the competitive ability of enterprise.

Thin-wall injection molding of high-density polyethylene for infrared radiation system lenses

2018 ◽  
Vol 38 (3) ◽  
pp. 307-313
Author(s):  
Ryo Kaneda ◽  
Toshihiro Takahashi ◽  
Masayasu Takiguchi ◽  
Motoharu Hijikata ◽  
Hiroshi Ito
Keyword(s):  
Surface Roughness ◽  
Injection Molding ◽  
Infrared Radiation ◽  
High Density Polyethylene ◽  
Molecular Chain ◽  
Thin Wall ◽  
Chain Orientation ◽  
Molded Parts ◽  
Wall Injection ◽  
Molecular Chain Orientation

AbstractHigh-density polyethylene (HDPE) lenses are used for infrared radiation (IR) systems, such as radiation thermometers to transmit the IR of the 10 μm region. High IR transmittance and low visible ray (VR) transmittance are necessary for IR system lenses. This experimental investigation of thin-wall injection molding was conducted using 0.5 mm cavity thickness with a disk shape, finished to a mirror-like surface. As factors affecting transmittance, we evaluated the thickness, surface roughness, crystallinity, internal structure, and molecular chain orientation of molded parts, which were produced using four HDPE melt flow rates (MFRs). The changed molding conditions were mold temperature and holding pressure. Results showed that the thin-molded parts had higher IR transmittance. The thin-molded part was obtained with the smallest MFR of 5. Furthermore, the VR transmittance decreased when the molecular chain orientation in the molded parts was small and the crystallinity was high. The small orientation and high crystallinity were obtained simultaneously with the largest MFR of 42. Therefore, it was impossible to obtain high IR transmittance and low VR transmittance simultaneously by a change of MFR. This study confirmed that surface roughness and crystallinity do not affect transmittance.

Effect of process conditions on the dart impact properties of thin-wall injection-molded polycarbonate plates

2012 ◽  
Vol 127 (3) ◽  
pp. 1466-1474 ◽  
Author(s):  
Jong-Sin Moon ◽  
Jeong-Moo Lee ◽  
Shi-Ho Lee ◽  
Byoung-Ho Choi
Keyword(s):  
Process Conditions ◽  
Thin Wall ◽  
Impact Properties ◽  
Injection Molded ◽  
Wall Injection
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