The Effects of Various Variotherm Processes and Their Mechanisms on Injection Molding

Huang, Chao-Tsai; Hsien, I.-S.; Tsai, Chun-Yu; Chiou, Yih-Chih; Tang, Chengchun

doi:10.3139/217.2436

Cited by 11 publications

(10 citation statements)

References 2 publications

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“…It was also investigated how ferrite materials can improve the induction heating from the coil, and this is found to be an important factor for increasing the heating rate. C. T. Huang et al [23,24] compared different heating methods such as rapid heat cycle using, e.g., steam, induction heating, and electrical heating and showed its influence on the flow with experiments and flow simulations in Moldex3D. They also looked at the warpage of the parts and obtained reasonable agreement.…”

Section: Introductionmentioning

confidence: 95%

“…16. The induction coil is here inserted as a cooling channel, which uses steam, since induction heating is not directly supported in Moldex3D [23,24]. The steam temperature is set to 250 °C for 3 s, and then 45 °C when the induction heating is turned off for ABS.…”

Section: Setupmentioning

confidence: 99%

“…The work done in [10,12,15] also assume linear magnetic data, similarly to the previously mentioned papers. In [23,24], the thermal field is modeled in the injection molding flow solver to directly calculate the effect of a heated mold.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Three-dimensional numerical modeling of an induction heated injection molding tool with flow visualization

Guerrier

Tosello

Nielsen

et al. 2015

Int J Adv Manuf Technol

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Section: Introductionmentioning

confidence: 95%

Section: Setupmentioning

confidence: 99%

See 1 more Smart Citation

Three-dimensional numerical modeling of an induction heated injection molding tool with flow visualization

Guerrier

Tosello

Nielsen

et al. 2015

Int J Adv Manuf Technol

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“…In the injection molding process, one of the main operating parameters that affect the properties of the final object is the mold temperature [17,18]. Surface finishing, morphology distribution, and possibility to produce micro and nano-structures on the molded surface strongly depend on the temperature adopted in the mold and, in particular, on the cavity surface [19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Effect of Rapid Mold Heating on the Structure and Performance of Injection-Molded Polypropylene

et al. 2020

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The tailoring by the process of the properties developed in the plastic objects is the more effective way to improve the sustainability of the plastic objects. The possibility to tailor to the final use the properties developed within the molded object requires further understanding of the relationship between the properties of the plastic objects and the process conduction. One of the main process parameters that allow adjusting the properties of molded objects is the mold temperature. In this work, a thin electrical heater was located below the cavity surface in order to obtain rapid and localized surface heating/cooling cycles during the injection molding process. An isotactic polypropylene was adopted for the molding tests, during which surface temperature was modulated in terms of values and heating times. The modulation of the cavity temperature was found able to control the distribution of relevant morphological characteristics, thus, properties along the sample thickness. In particular, lamellar thickness, crystallinity distribution, and orientation were analyzed by synchrotron X-ray experiments, and the morphology and elastic modulus were characterized by atomic force microscopy acquisitions carried out with a tool for the simultaneous nanomechanical characterization. The crystalline degree slightly increased with the cavity temperature, and this induced an increase in the elastic modulus when high temperatures were adopted for the cavity surface. The cavity temperature strongly influenced the orientation distribution that, on its turn, determined the highest values of the elastic modulus found in the shear layer. Furthermore, although the sample core, not experiencing a strong flow field, was not characterized by high levels of orientation, it might show high values of the elastic modulus if temperature and time during crystallization were sufficient. In particular, if the macromolecules spent adequate time at temperatures close to the crystallization temperature, they could achieve high levels of structuring and, thus, high values of elastic modulus.

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“…At present, there exist various methods of heating induction moulds that operate in dynamic temperature cycles [1][2][3]. In spite of marketing information, there is not a one universal technology that can satisfy all the requirements set by the entire industry.…”

Section: Introductionmentioning

confidence: 99%

Simulation Study of Induction Heating of Multi-Metallic Injection Moulds

Mrozek¹

2018

Int. j. simul. model.

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This paper presents a concept and a simulation study into induction heating of multi-metallic injection moulds. This novel technology involves heating only selected cavity walls which are critical areas in forming thin-walled parts. Such regions are often places, where defects occur. In order eliminate the defects, it requires increasing the temperature of selected critical forming walls within a single cavity. In this work, simplified models of forming inserts of different shapes were created. Walls intended for induction heating were selected and separated. Forming cavities were defined as paramagnetic materials, whereas, heated walls were made of ferromagnetic steel 1.2343. Induction coil was placed 1 -5 mm away from the wall. As a current source 10 kW induction generator EFD Minac 6 was used. The current frequency was 25 kHz. The obtained results show that it is possible, without a significant cycle time growth, to dynamically increase the temperature of selected walls by applying selective induction heating technology.

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The Effects of Various Variotherm Processes and Their Mechanisms on Injection Molding

Cited by 11 publications

References 2 publications

Three-dimensional numerical modeling of an induction heated injection molding tool with flow visualization

Three-dimensional numerical modeling of an induction heated injection molding tool with flow visualization

Effect of Rapid Mold Heating on the Structure and Performance of Injection-Molded Polypropylene

Simulation Study of Induction Heating of Multi-Metallic Injection Moulds

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