Optimizing Glass Fiber Molding Process Design by Reverse Warping

The purpose of this study is to clarify the influence of changes in glass fiber properties on warpage prediction, and to demonstrate the importance of accurate material property data in the numerical simulation of injection molding. In addition, this study proposes an optimization method based on the reverse warping agent model, in which the thermal conductivity of the plastic material is reduced, and the solidified layer on the surface of the mold is reduced and transferred from the molding material to the mold wall. This means that by the end of the cooling phase, the shrinkage of the molten zone within the component will continue, resulting in warpage. Based on the optimal process parameters, the sensitivity of the warpage prediction to the relationship between the two most important material properties, the glass fiber and holding pressure time, was analyzed. The material property model constants used for numerical simulations can sometimes vary significantly due to inherent experimental measurement errors, the resolution of the test device, or the manner in which the curve fit is performed to determine the model constants. This model has been developed to intelligently determine the preferred processing parameters and to gradually correct the details of the molding conditions. Thus, the cavity is separated in the critical warpage region, and a new cavity geometry with a reverse warped profile is placed into the mold base slot. The results show that the hypothetical and reasonable variation of the glass fiber model constant and the holding pressure time relationship may significantly affect the magnitude of the warpage prediction of glass fiber products. The greatest differences were found as a result of the warping orientation of the glass fiber material.

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Injection Molding Process Parameter Optimization for Warpage Minimization Based on Uniform Design of Experiment

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.37-38.570 ◽

2010 ◽

Vol 37-38 ◽

pp. 570-575 ◽

Cited By ~ 1

Author(s):

Bao Shou Sun ◽

Zhe Chen ◽

Bo Qin Gu ◽

Xiao Diao Huang

Keyword(s):

Injection Molding ◽

Design Of Experiment ◽

Simulation Analysis ◽

Uniform Design ◽

Mold Temperature ◽

Optimization Method ◽

Processing Parameters ◽

Injection Molding Process ◽

Molding Process ◽

Melt Temperature

To optimize injection molding warpage, this paper applies the uniform design of experiment method to search for the optimal injection molding processing parameters. The warpage. simulation analysis is accomplished by emplying Moldflow software. The melt temperature, mold temperature, injection time and packing pressure are regarded as processing parameters, and processing parameters are optimized through establishing a regression equation, and the optimization result and influence factors are analyzed. The results show that uniform design of experiment can reduce number of experiments used effectively and the quality of the product is greatly improved by the optimization method.

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Lightweight High-Performance Polymer Composite for Automotive Applications

Polymers ◽

10.3390/polym11020326 ◽

2019 ◽

Vol 11 (2) ◽

pp. 326 ◽

Cited By ~ 13

Author(s):

Valentina Volpe ◽

Sofia Lanzillo ◽

Giovanni Affinita ◽

Beniamino Villacci ◽

Innocenzo Macchiarolo ◽

...

Keyword(s):

Glass Fiber ◽

Automotive Industry ◽

High Performance ◽

Injection Pressure ◽

Dimensional Accuracy ◽

Processing Parameters ◽

Injection Molding Process ◽

Polyamide 66 ◽

Molding Process ◽

And Performance

The automotive industry needs to produce plastic products with high dimensional accuracy and reduced weight, and this need drives the research toward less conventional industrial processes. The material that was adopted in this work is a glass-fiber-reinforced polyamide 66 (PA66), a material of great interest for the automotive industry because of its excellent properties, although being limited in application because of its relatively high cost. In order to reduce the cost of the produced parts, still preserving the main properties of the material, the possibility of applying microcellular injection molding process was explored in this work. In particular, the influence of the main processing parameters on morphology and performance of PA66 + 30% glass-fiber foamed parts was investigated. An analysis of variance (ANOVA) was employed to identify the significant factors that influence the morphology of the molded parts. According to ANOVA results, in order to obtain homogeneous foamed parts with good mechanical properties, an injection temperature of 300 °C, a high gas injection pressure, and a large thickness of the parts should be adopted.

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Optimization of Injection Molding Process Parameters to Increase the Tensile Strength in Polyamide-Specimen Using the Taguchi Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.341-342.395 ◽

2011 ◽

Vol 341-342 ◽

pp. 395-399 ◽

Cited By ~ 1

Author(s):

S. Esmail Mirvar ◽

Ramin Mohamadi Kaleybar ◽

Ahmad Afsari

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Injection Molding ◽

Process Parameters ◽

Processing Parameters ◽

Design Parameters ◽

Injection Molding Process ◽

Molding Process ◽

Pressure Time ◽

Injection Molded

Mechanical properties of plastic play an important role in defining the quality of injection molded products. Many studies have shown that mechanical properties of a product are influenced by the process parameters governing the injection-molding processes .This study employs Taguchi design parameters, to systematically investigate the influence of injection molding processing parameters on the tensile strength of Commercial grade Polyamide (PA-6). The result shows that the holding pressure time has main effect on the tensile strength, followed by cooling time, and holding pressure. Finally, a specimen produced according to the general form of the predictive equation of process parameters and verification test is performed on that. Test results show that the experimental value of tensile strength is very close to the estimated value.

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Constant Temperature Approach for the Assessment of Injection Molding Parameter Influence on the Fatigue Behavior of Short Glass Fiber Reinforced Polyamide 6

Polymers ◽

10.3390/polym13101569 ◽

2021 ◽

Vol 13 (10) ◽

pp. 1569

Author(s):

Selim Mrzljak ◽

Alexander Delp ◽

André Schlink ◽

Jan-Christoph Zarges ◽

Daniel Hülsbusch ◽

...

Keyword(s):

Injection Molding ◽

Glass Fiber ◽

Process Parameters ◽

Fatigue Properties ◽

Injection Molding Process ◽

Molding Process ◽

Short Glass Fiber ◽

Glass Fiber Reinforced ◽

Molding Parameter ◽

Short Glass

Short glass fiber reinforced plastics (SGFRP) offer superior mechanical properties compared to polymers, while still also enabling almost unlimited geometric variations of components at large-scale production. PA6-GF30 represents one of the most used SGFRP for series components, but the impact of injection molding process parameters on the fatigue properties is still insufficiently investigated. In this study, various injection molding parameter configurations were investigated on PA6-GF30. To take the significant frequency dependency into account, tension–tension fatigue tests were performed using multiple amplitude tests, considering surface temperature-adjusted frequency to limit self-heating. The frequency adjustment leads to shorter testing durations as well as up to 20% higher lifetime under fatigue loading. A higher melt temperature and volume flow rate during injection molding lead to an increase of 16% regarding fatigue life. In situ Xray microtomography analysis revealed that this result was attributed to a stronger fiber alignment with larger fiber lengths in the flow direction. Using digital volume correlation, differences of up to 100% in local strain values at the same stress level for different injection molding process parameters were identified. The results prove that the injection molding parameters have a high influence on the fatigue properties and thus offer a large optimization potential, e.g., with regard to the component design.

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Micromechanical modeling of glass fiber reinforced plastic material

Materials Today Proceedings ◽

10.1016/j.matpr.2020.12.919 ◽

2021 ◽

Author(s):

Dan Micota ◽

Alexandru Isaincu ◽

Liviu Marsavina

Keyword(s):

Glass Fiber ◽

Plastic Material ◽

Micromechanical Modeling ◽

Fiber Reinforced ◽

Glass Fiber Reinforced Plastic ◽

Fiber Reinforced Plastic ◽

Glass Fiber Reinforced ◽

Reinforced Plastic

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Technologies for processing materials based on glass-fiber materials

Science intensive technologies in mechanical engineering ◽

10.30987/2223-4608-2021-6-24-28 ◽

2021 ◽

Vol 2021 (6) ◽

pp. 24-28

Author(s):

Kseniya Golubeva ◽

Aleksey Noskov

Keyword(s):

Glass Fiber ◽

Fiber Material ◽

Alternative Methods ◽

Processing Methods ◽

Characteristic Features ◽

Fiber Materials ◽

Abrasive Cutting

The review of basic methods for glass-fiber material machining is shown, characteristic features are presented also advantages and drawbacks of different processing methods are mentioned. There is shown a description of glass-fiber material edge machining. The alternative methods such as hydro-abrasive cutting and laser working are considered.

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STUDY OF DEFECT ON 180 ML HDPE BOTTLES YOGURT PRODUCTS WITH SMC B11 EXTRUSION BLOW MACHINE AT PT X

KREATOR ◽

10.46961/kreator.v4i1.306 ◽

2021 ◽

Vol 4 (1) ◽

Author(s):

Tommy Prasetya Kana ◽

Handika Dany Rahmayanti ◽

HM Didik

Keyword(s):

High Density Polyethylene ◽

Plastic Material ◽

Production Cycle ◽

Molding Process ◽

Plastic Packaging ◽

Cycle Times ◽

Blow Molding ◽

Plastic Bottle ◽

Extrusion Blow Molding ◽

Stretch Blow Molding

The type of plastic packaging that is popular in the community is bottle packaging. The plastic material that is generally used to make plastic bottles is High Density Polyethylene (HDPE). The plastic bottle industry in Indonesia usually uses a blow molding process in its production process, where the blow molding process consists of injection blow molding, extrusion blow molding and stretch blow molding. The SMC B11 machine is one of the extrusion blow molding machines used to produce plastic bottle packaging. In producing workpieces, this machine still produces several products that are not in accordance with company standards, including in terms of production cycle times and product defects. Defects or defects that are often encountered include the appearance of spots, bent parison which causes the bottle to bend (the bottle body is thin one side) and blow pin which causes the thread to not fit.Keywords— Bottle, Plastic, Defect, Extrussion Blow Molding

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