Development of a rapid thermal cycling molding with electric heating and water impingement cooling for injection molding applications

Xiao, Chenglong; Huang, Hanxiong

doi:10.1016/j.applthermaleng.2014.08.027

Cited by 31 publications

(13 citation statements)

References 35 publications

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“…Heat transfer is one of the most important segments in injection molding [2] because it significantly affects the temperature distribution of the component and alters the temperature distribution in the mold, thereby affecting the mechanical behavior and dimensional precision of the plastic component, as well as production efficiency [3]. Xiao [4] developed a rapid thermal cycling molding with electric heating and water impingement cooling for shortening the cycle time and improving the surface quality of the plastic component. Agazzi [5] optimized the cooling design based on morphological surfaces for achieving the conformal cooling and avoiding the component warpage.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of heat transfer coefficient between polymer and cavity wall for improving cooling and crystallinity results in injection molding simulation

Liu

Gehde

2015

Applied Thermal Engineering

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Section: Introductionmentioning

confidence: 99%

Evaluation of heat transfer coefficient between polymer and cavity wall for improving cooling and crystallinity results in injection molding simulation

Liu

Gehde

2015

Applied Thermal Engineering

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“…In the past few years, many effective methods have been proposed to rapidly heat the mold. Some typical categories include mold surface or internal resistance heating [10,11], high-temperature fluid (such as saturated steam [12] and hot gas [13]) assisted mold heating, infrared radiation heating [14], high-frequency proximity heating [15], induction heating [16,17], etc. Among these methods, the induction heating has obvious advantages in terms of heating efficiency, temperature control accuracy and design flexibility of mold heating system.…”

Section: Introductionmentioning

confidence: 99%

Multi-objective optimization of heating system for rapid thermal cycling molding mold with internal induction heating

Xiao

Kahve

2021

SN Appl. Sci.

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A rapid thermal cycling molding (RTCM) with novel internal induction heating mode is proposed in this work. The induction coils are directly inserted in the corresponding mounting holes of mold with an annular gap in between. During mold heating, eddy current losses confined at the walls of the mounting holes act as thermal sources to rapidly heat the mold cavity surface. Water passed through the annular gaps can be utilized to cool the mold in the cooling stage. Moreover, a design framework of the internal induction heating system in the RTCM mold is also developed. Firstly, a unit cell model of the mold was established to evaluate mold thermal response via numerical simulations, in which the effect of frequency and magnitude of coil current, the layout of induction coils and the annular gap size were examined. Then, a hybrid multi-objective optimization method was applied to optimize the induction heating system for the unit cell model. Finally, based on the obtained optimal parameters, a novel design strategy was adopted to conformally arrange the induction coils for the industrial RTCM molds. The blow mold of automotive spoiler was taken as an example to validate the effectiveness of the proposed approach. The results show that the present approach cannot only improve the mold thermal response performance, but also facilitate the mold heating system design process. This work may provide an effective method to realize RTCM of industrial plastics parts with free-form shape.

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“…There have been many attempts to eliminate bubble marks to improve the surface quality. For example, rapid thermal cycle molding (RTCM) technology was developed to eliminate surface defects of the microcellular injection molded parts [8,9,10,11,12]. By increasing the temperature of the mold cavity surface, the fluidity of the melt can be increased, thereby increasing the filling ability of the melt to dissolve the bubble marks back into the melt [13].…”

Section: Introductionmentioning

confidence: 99%

A Combined In-Mold Decoration and Microcellular Injection Molding Method for Preparing Foamed Products with Improved Surface Appearance

et al. 2019

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A combined in-mold decoration and microcellular injection molding (IMD/MIM) method by integrating in-mold decoration injection molding (IMD) with microcellular injection molding (MIM) was proposed in this paper. To verify the effectiveness of the IMD/MIM method, comparisons of in-mold decoration injection molding (IMD), conventional injection molding (CIM), IMD/MIM and microcellular injection molding (MIM) simulations and experiments were performed. The results show that compared with MIM, the film flattens the bubbles that have not been cooled and turned to the surface, thus improving the surface quality of the parts. The existence of the film results in an asymmetrical temperature distribution along the thickness of the sample, and the higher temperature on the film side leads the cell to move toward it, thus obtaining a cell-offset part. However, the mechanical properties of the IMD/MIM splines are degraded due to the presence of cells, while specific mechanical properties similar to their solid counterparts are maintained. Besides, the existence of the film reduces the heat transfer coefficient of the film side so that the sides of the part are cooled asymmetrically, causing warpage.

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Development of a rapid thermal cycling molding with electric heating and water impingement cooling for injection molding applications

Cited by 31 publications

References 35 publications

Evaluation of heat transfer coefficient between polymer and cavity wall for improving cooling and crystallinity results in injection molding simulation

Evaluation of heat transfer coefficient between polymer and cavity wall for improving cooling and crystallinity results in injection molding simulation

Multi-objective optimization of heating system for rapid thermal cycling molding mold with internal induction heating

A Combined In-Mold Decoration and Microcellular Injection Molding Method for Preparing Foamed Products with Improved Surface Appearance

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