Thermally conductive polymer compounds for injection moulding: The synergetic effect of hexagonal boron-nitride and talc

Kovács, József; Suplicz, András

doi:10.1177/0731684413489755

Cited by 23 publications

(13 citation statements)

References 18 publications

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“…Alig et al [34,35] showed that the processing and thereby the shear prehistory influences the (electrical) conductivity of composites. Though, with the addition of thermal conductive fillers, processing conditions as described by Ng et al [36] and Kovacs et al [37] heavily influence dispersion, orientation and degradation of the filler. Furthermore, both studies showed that the thermal conductivity also depends on the sample shaping method.…”

Section: Thermally Conductive Polypropylenementioning

confidence: 99%

Preparation and properties of thermally conductive polypropylene composites

Standau¹

2016

Zeitschrift Kunststofftechnik

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Section: Thermally Conductive Polypropylenementioning

confidence: 99%

Preparation and properties of thermally conductive polypropylene composites

Standau¹

2016

Zeitschrift Kunststofftechnik

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“…Single-specimen hot plate apparatus was used according to the publication of Suplicz et al [33]. In this equipment, the heat flows in a single direction between the hot plate and the cold plate through the specimen, which is a simpler apparatus than a conventional two-specimen.…”

Section: Methodsmentioning

confidence: 99%

Comparison of thermal, mechanical and thermomechanical properties of poly(lactic acid) injection-molded into epoxy-based Rapid Prototyped (PolyJet) and conventional steel mold

Tábi

Kovács

Sajó

et al. 2015

J Therm Anal Calorim

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The number of renewable resource based and inherently biodegradable Poly(Lactic Acid) (PLA) products are growing in the market, resulting in an increasing demand to produce even small series of injection molded PLA prototypes for testing purposes by using rapid molds. In our research it was first demonstrated that it is possible to use epoxy based molds made by PolyJet Rapid Prototyping technology for conventional injection molding to produce small series of PLA parts. The effect of mold material, namely conventional steel mold and epoxy based PolyJet mold was analyzed on the thermal and mechanical properties of the injection molded products.PLA was used with no, moderate and high nucleating agent content (Talc and Poly(Ethylene Glycol)) to obtain a model material with slow, moderate and high crystallization rate respectively. It was demonstrated that the mold used and thus the thermal conductivity of the mold had significant effect on the crystallinity of the PLA parts and thus on its' mechanical and thermomechanical properties. Finally, it was found that it is possible to mimic the thermomechanical properties of nucleated PLA injected into hot mold used for mass production by injecting it into the epoxy based PolyJet mold used for small series production.3

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“…For this purpose, an in-house developed one-specimen hot-plate apparatus was used, presented in previous work [28]. For the measurements, 80x80 mm specimens were printed with thicknesses of 2, 4 and 8 mm.…”

Section: Measurements Of Thermal Conductivitymentioning

confidence: 99%

Thermal simulations and measurements for rapid tool inserts in injection molding applications

Kovács

Szabó

Kovács

et al. 2015

Applied Thermal Engineering

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Rapid prototyping (RP) is a widely used process in the industry to shorten development time.Another advantage of this technology is the ability to create conformal cooling systems, thus not only cooling time and cycle time can be shortened, but also shrinkage, thus warpage can be decreased. The main disadvantage of Rapid prototyping materials is their low thermal conductivity, which strongly influences cooling properties and warpage.The research based on a special developed injection mold for novel rapid prototyping based mold inserts with cooling systems. A method has been introduced to determine the most important thermal parameters for injection molding simulations using rapid tools. Those parameters, which can be measured such as the specific heat and thermal conductivity of the mold materials, are directly implemented into the software. The heat transfer coefficient between the polymer melt and the rapid tool insert surface cannot be measured in a reasonable way, thus simulation software was used to determine that based on indirect calculation 2 derived from real measurements. In the paper, the method was proved with Fused Deposition Modeling (FDM) and Polyjet mold inserts.

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Thermally conductive polymer compounds for injection moulding: The synergetic effect of hexagonal boron-nitride and talc

Cited by 23 publications

References 18 publications

Preparation and properties of thermally conductive polypropylene composites

Preparation and properties of thermally conductive polypropylene composites

Comparison of thermal, mechanical and thermomechanical properties of poly(lactic acid) injection-molded into epoxy-based Rapid Prototyped (PolyJet) and conventional steel mold

Thermal simulations and measurements for rapid tool inserts in injection molding applications

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