Shrinkage Analysis of a Constrained Thin Walled Injection Molded Component Using a Traditional Flatbed Scanner and Photometric Techniques

2008 ◽  
Author(s):  
Steve Sobolak ◽  
Badih Jawad
Keyword(s):  
Flatbed Scanner ◽  
Injection Molded ◽  
Thin Walled

Anisotropy Study of a Constrained Thin Walled Component Using a Range of Processing Control Factors

2007 ◽  
Author(s):  
Steven J. Sobolak ◽  
Badih A. Jawad
Keyword(s):  
Glass Fiber ◽  
Wall Thickness ◽  
Shrinkage Rate ◽  
Measuring System ◽  
Fiber Concentration ◽  
Shrinkage Ratio ◽  
Control Factors ◽  
Injection Molded ◽  
Thin Walled ◽  
Processing Control

An anisotropy study was performed on a constrained thin-walled injection molded component using measurements made from a laser measuring system. Wall thickness and material glass fiber concentration were varied to determine their effects on parallel and perpendicular shrinkage rates. Several ranges of the processing control factors were used in the study. The shrinkages were determined and were described as a function of glass fiber concentration and wall thickness. The shrinkage ratio (a ratio representing the parallel shrinkage rate divided by the correlative perpendicular shrinkage rate) was used to investigate the influence of wall thickness and glass fiber (G.F.) concentration on shrinkage.

scholarly journals Design of compositions and types of structures of injection molded dispersed filled thermoplastics with good processability and high strength

2021 ◽  
pp. 10-12
Author(s):  
I. D. Simonov-Emelianov ◽  
D. D. Krechetov ◽  
K. I. Kharlamova
Keyword(s):  
Filler Content ◽  
High Strength ◽  
Disperse Structure ◽  
Dispersed Filler ◽  
Different Types ◽  
Injection Molded ◽  
Thin Walled ◽  
Generalized Parameters ◽  
Processing Properties ◽  
First Time

The issues on the assessment of rheological properties of dispersed filled polymer composite materials (DFPCM) in terms of generalized parameters of disperse structure are considered. The dependences of pressure loss during injection molding of thin-walled DFPСM products with different types of disperse structure: dilute, low-filled, medium-filled and high-filled systems are given for the first time. It has been established that to obtain DFPCM based on thermoplastics with good processing properties and products with high strength, it is necessary to create materials having medium-filled type of structure and the generalized parameter Θ ≈ 0.5-0.6 vol/vol. The algorithm for calculating the dispersed filler content with known basic properties to provide a given type of DFPCM structure is proposed.

Warpage Reduction Through Robust Engineering of a Thin-Walled Injection Molded Component

2007 ◽  
Author(s):  
Steven J. Sobolak ◽  
Badih A. Jawad
Keyword(s):  
Relative Viscosity ◽  
Measuring System ◽  
Control Factor ◽  
Production Cycle ◽  
Injection Speed ◽  
Injection Molded ◽  
Thin Walled ◽  
Processing Control ◽  
Robust Processing ◽  
Noise Factors

An L18 Taguchi experiment was used to determine the robust processing control factor settings to maximize dimensional stability and reduce warpage for a 3-dimensional thin-walled injection molded component. The robust control factor settings were determined for seven control factor settings and also included three noise factors. The noise factors were: wall thickness, glass fiber content and production cycle pull point. A scientific molding technique where an on-line rheology study was performed to determine the relative viscosity versus effective shear rates was used to determine the injection speed settings. The proper shot size was also established for each experiment. A laser measuring system was used to analyze the entire component and to determine the shrinkage rates and warpage of the component. A warpage index was created to determine the entire warpage of the component.

scholarly journals Spontaneous buckling of thin-walled injection-molded parts

Mechanik ◽  
2019 ◽  
Vol 92 (1) ◽  
pp. 7-9
Author(s):  
Przemysław Poszwa ◽  
Paweł Brzęk ◽  
Wiktor Hoffmann
Keyword(s):  
Numerical Simulation ◽  
Experimental Validation ◽  
Industrial Applications ◽  
Theoretical Background ◽  
Wide Range ◽  
Molded Parts ◽  
Injection Molded ◽  
Thin Walled ◽  
Plastic Parts ◽  
Injection Molded Plastic

Injection molding technology has a wide range of industrial applications, especially in packaging and casing production. In this paper the spontaneous buckling of thin-walled injection molded plastic parts was described. Theoretical background along with numerical simulation and experimental validation of this phenomenon were presented.

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