A simulation study of the effect of preform cooling time in injection stretch blow molding

Daver, Fügen; Demirel, Bilal

doi:10.1016/j.jmatprotec.2012.06.004

Cited by 21 publications

(19 citation statements)

References 10 publications

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“…First of all, using UG to infusion bottle embryo structure modeling 3D model, its shrinkage rate is set at 3%; rough manual modeling method, mold design is performed, various modeling commands in UG are invoked, and the plastic parts are divided and molded by the summation and difference. In the end, the core and cavity are obtained, because the upper and lower parts of the infusion bottle are symmetrical, and the core cavity is the same [16]. e structure of the core cavity of the infusion bottle embryo core obtained by using UG is shown in Figure 4.…”

Section: Design Of Molding Parts For Injection Mold Of Infusionmentioning

confidence: 99%

“…Orthogonal test is a method for seeking the best level combination with multiple factors and the minimum test times [16]. After considering the requirements of quality of the infusion bottle comprehensively, six process parameters were selected as the factors of orthogonal test: melt temperature, mold temperature, injection pressure, injection time, dwell pressure, and dwell time, which was marked as A, B, C, D, E, and F, respectively, with five levels (Table 1).…”

Section: Orthogonal Experimentsmentioning

confidence: 99%

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Optimization of Process Parameters for Vertical‐Faced Polypropylene Bottle Injection Molding

Wang

Yan

Shan

2018

Advances in Materials Science and Engineering

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In order to obtain the optimal combination of process parameters for vertical-faced polypropylene bottle injection molding, with UG, the model of the bottle was drawn, and then, one module and sixteen-cavity injection molding system was established and analyzed using Moldflow. For filling and maintaining pressure during the process of infusion bottle injection molding, the orthogonal test table L25 (5 6 ) using CAE was designed for injection molding of the bottle, with six parameters such as melt temperature, mold temperature, injection pressure, injection time, dwell pressure, and dwell time as orthogonal test factors. By finding the best combination of process parameters, the orthogonal experiment was completed, the results were analyzed by range analysis, and the order of influence of each process parameter on each direction of optimization was obtained. e prediction dates of the infusion bottle were gained under various parameters, a comprehensive quality evaluation index of the bottle was formulated, and the multiobjective optimization problem of injection molding process was transformed into a single-objective optimization problem by the integrated weighted score method. e bottle parameters were optimized by analyzing the range date of the weighted scoring method, and the best parameter combination such as melt temperature 200°C, mold temperature 80°C, injection pressure 40 MPa, injection time 2.1 S, dwell pressure 40 MPa, and dwell time 40 S was gained.

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Section: Design Of Molding Parts For Injection Mold Of Infusionmentioning

confidence: 99%

Section: Orthogonal Experimentsmentioning

confidence: 99%

Optimization of Process Parameters for Vertical‐Faced Polypropylene Bottle Injection Molding

Wang

Yan

Shan

2018

Advances in Materials Science and Engineering

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“…Th e proper choice of operation depends on the type and size of the product and the materials to be used. Th e critical parameter in determining the type of blow molding operation is rheology of the material [83,84]. It has evolved from being a technique for the production of plastic containers into a manufacturing process for the production of industrial parts of automobiles, offi ce and domestic appliances, fi lms, and hollow plastic parts such as bottles, containers, fuel tanks, etc.…”

Section: Blow Moldingmentioning

confidence: 99%

Polyoxymethylene Processing

Pielichowska¹

2014

Polyoxymethylene Handbook

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In this chapter major issues of polyoxymethylene (POM) and its nanocomposites processing are presented. Diff erent processing methods-injection molding, extrusion, blow molding, melt blowing, compression molding, rolling, sintering and spinning-as well as fabrication of highly oriented products, waste recycling, machining and assembling of moldings and semi-fi nished parts are described in regard to POM, which is an important engineering polymer used as structural material in all industrial sectors. However, processing of POM requires special attention since this polymer undergoes facile decomposition with evolution of formaldehyde. Some of the processing methods are for POM at infancy stage, such as electrospinning, due to poor solubility of this polymer in common solvents. Only recently has the successful electrospinning of polyoxymethylene nanofi bers with porous surface using a hexafl uoroisopropanol (HFIP)-based solvent been reported on. Polyoxymethylene types include impact modifi ed, fi lled and reinforced polymers in a wide range of sorts-this diversity may cause some problems during recycling by recompounding and remelting where extensive POM decomposition should be avoided because of formaldehyde release.

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“…Injection Stretch Blow Molding process is a widely used fabrication technique for the production of hollow plastic containers [1], [2] [3] [4] [5] [6] [7], [8]. It comprises the stretching and blowing at the same time, of a preheated preform.…”

Section: Introductionmentioning

confidence: 99%

“…During the real process, there is a short time delay before stretching and blowing. This time delay is often called 'preform co time [2]. In this study, it was assumed that the preform cooling time is 3.5seconds.…”

Section: Introductionmentioning

confidence: 99%

A numerical investigation of the effect of preform length for the fabrication of 1.5Lt PET bottle through the injection stretch blow molding process

Lontos

Gregoriou

2018

MATEC Web Conf.

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Abstract. This study carries the numerical effort for the investigation of effect of preform length on the final product wall thickness distribution. For the investigation, three different preform length cases were taken under consideration. Preform A, preform B and preform C of length 144.75mm, 165.7mm and 186.65mm respectively. All the preforms were stretched up to a same critical point respect to mold length so that the axial deformation during blowing was fair for all the preform cases. Blowing conditions were the same for all cases. The stretching period for each case was set in accordance to the to the limit of critical stretching point. The mass of all preform cases was 58.33grams. It was found that preform B and C result in more uniform thickness distribution. The optimum results are given by preform C, since the resulting product appears the less spots with excess usage of raw material. The heavier bottle bottom region resulting from preform C enhances the steadiness of the bottle.

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A simulation study of the effect of preform cooling time in injection stretch blow molding

Cited by 21 publications

References 10 publications

Optimization of Process Parameters for Vertical‐Faced Polypropylene Bottle Injection Molding

Optimization of Process Parameters for Vertical‐Faced Polypropylene Bottle Injection Molding

Polyoxymethylene Processing

A numerical investigation of the effect of preform length for the fabrication of 1.5Lt PET bottle through the injection stretch blow molding process

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