Numerical simulation of acrylonitrile-butadiene-styrene material’s vacuum forming process

Wang, S; Makinouchi, Akitake; Tosa, Takahiro; Kidokoro, Katsumi; Okamoto, Masami; Kotaka, Tadao; Nakagawa, Takeo

doi:10.1016/s0924-0136(98)00440-3

Cited by 12 publications

(4 citation statements)

References 6 publications

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“…Reducing external pressure also helps the discharge of bubbles in RMC. Based on this theory, vacuum pouring technologies is proposed, as shown in Fig. .…”

Section: Methodsmentioning

confidence: 99%

Experimental investigation on air void and compressive strength optimization of resin mineral composite for precision machine tool

et al. 2016

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Resin mineral composite (RMC) consists of epoxy resin, granite aggregate and fly ash, and which can be used to produce precision machine tool beds due to its superior vibration alleviating properties. However, applications of RMC are restricted due to its limited mechanical strength. In this paper, the effects of the air void on the compressive strength of RMC were firstly introduced. Then the effects of vibration time, initial temperature of resin, mass of compression mould, vacuum degree, number of layers and mass content of defoamer on the air void and compressive strength of RMC were thoroughly investigated. Experimental results show that the air void (compressive strength) of RMC first decreases (increases) and then stabilizes as the vibration time and number of layers increases. Results also show that the air void (compressive strength) of RMC first decreases (increases) and then increases (decreases) as the initial temperature of resin, mass of compression mould, vacuum degree and mass content of defoamer increases. In order to further reduce the air void of RMC and increase the compressive strength of RMC, five different compound technologies (i.e., CTA, CTB, CTC, CTD, CTE) at different temperature (10°C and 40°C) were investigated. The optimum air void (compressive strength) of RMC was achieved by the CTE at 10°C, in which the air void (compressive strength) decreased (increased) by 44.4% (19.7%) compared to the RMC poured by CTA (standard pouring technologies) at 10°C. Afterwards, the relationship between air void and compressive strength of RMC was studied systematically. POLYM. COMPOS., 39:457–466, 2018. © 2016 Society of Plastics Engineers

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“…Reducing external pressure also helps the discharge of bubbles in RMC. Based on this theory, vacuum pouring technologies is proposed, as shown in Fig. .…”

Section: Methodsmentioning

confidence: 99%

Experimental investigation on air void and compressive strength optimization of resin mineral composite for precision machine tool

et al. 2016

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“…Researchers have contributed to the study of design and development of mould cooling process in different ways. S.Wang et al had carried out the numerical simulation of a square cup under different temperatures for vacuum forming of acrylonitrile-butadiene-styrene (ABS) material [1]. H.Hassan et al had studied the three-dimensional time-dependent numerical analysis to predict the effect of the cooling system design on the solidification and heat transfer of polymer by injection molding process [2].…”

Section: Literature Surveymentioning

confidence: 99%

Study on Temperature Distribution to Enhance the Mould Cooling Method Used in Vacuum Forming Applications

Hussain¹,

Safiulla²,

Brahmaiah

2017

KEM

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Vacuum forming is one of the simplest means of manufacturing thin plastic parts wherein a heated plastic sheet is sent through the mould by creating a vacuum between part and mould to get the desired shape. The mould used in vacuum forming process gets heated upon continuous production which has to be cooled continuously to produce parts without affecting quality. In this paper, the currently available techniques to cool the mould viz. Chill plate attachment method, straight drilled cooling channels are studied. Finite Element Analysis is carried out on various methods of mould cooling. Temperature distribution is the criteria considered to evaluate the results of each case. The results have demonstrated that the straight drilled cooling channels are better in comparison with the chill plate attachment method of mould cooling. The concept of conformal cooling channels designed based on part shape has also been introduced and studied to reduce the cooling time of the mould which is found to have a fair temperature distribution amongst the three mould cooling methods.

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“…Nonuniform initial temperatures were obtained by iterative calculations for the desired thickness distribution of the thermoformed products made of ABS material. Wang et al [11] proposed a new material model based on the uniaxial tensile properties. Meissner-type rheometer was used to measure ABS material to take account for strain hardening, strain rate hardening, and temperature change.…”

Section: Introductionmentioning

confidence: 99%

Experimental determination of the viscoelastic parameters of K-BKZ model and the influence of temperature field on the thickness distribution of ABS thermoforming

Cha

Kim

Park

et al. 2019

Int J Adv Manuf Technol

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This study investigated an influence of the temperature field on thickness distribution of thermoformed products using complex and high-aspect-ratio mold. The optimum temperature field was obtained to achieve a more uniform thickness distribution in the thermoformed products by using finite element simulation. The material properties of acrylonitrile-butadiene-styrene (ABS) polymer sheet were obtained by two rheological measurement tests. The linear viscoelastic properties, such as the storage modulus and loss modulus, were measured by a small amplitude oscillatory shear (SAOS) test for wide ranges of frequency and temperature. The discrete relaxation time and discrete relaxation modulus were obtained by nonlinear regression. The fitting parameters C 1 and C 2 for the WLF model were obtained by curve fitting. The nonlinear viscoelastic property, such as stress relaxation modulus, was measured by a step strain test. The damping function and fitting parameter α of Wagner-Demarmels (WD) model were determined by curve fitting. Then, the Kaye-Bernstein-Kearsley-Zapas (K-BKZ) constitutive equation was utilized to the thermoforming simulation in order to investigate the material behavior of the polymer sheet. The numerical results showed that a more uniform thickness distribution could be achieved with the optimum temperature field of the sheet. The thinnest part of the products was improved by more than 30%.

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Numerical simulation of acrylonitrile-butadiene-styrene material’s vacuum forming process

Cited by 12 publications

References 6 publications

Experimental investigation on air void and compressive strength optimization of resin mineral composite for precision machine tool

Experimental investigation on air void and compressive strength optimization of resin mineral composite for precision machine tool

Study on Temperature Distribution to Enhance the Mould Cooling Method Used in Vacuum Forming Applications

Experimental determination of the viscoelastic parameters of K-BKZ model and the influence of temperature field on the thickness distribution of ABS thermoforming

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