Thermal analysis based method development for novel rapid tooling applications

Zink, Béla; Kovács, Norbert Krisztián; Kovács, József

doi:10.1016/j.icheatmasstransfer.2019.104297

Cited by 23 publications

(13 citation statements)

References 26 publications

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“…Thermodynamic process design. This includes the percentage of contraction or expansion, in-mold rheology, surface coatings, and hot zones required for special thermoregulation, melt temperature, and mold temperature [ 49 ].…”

Section: Resultsmentioning

confidence: 99%

E-Skin Development and Prototyping via Soft Tooling and Composites with Silicone Rubber and Carbon Nanotubes

et al. 2021

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The strategy of embedding conductive materials on polymeric matrices has produced functional and wearable artificial electronic skin prototypes capable of transduction signals, such as pressure, force, humidity, or temperature. However, these prototypes are expensive and cover small areas. This study proposes a more affordable manufacturing strategy for manufacturing conductive layers with 6 × 6 matrix micropatterns of RTV-2 silicone rubber and Single-Walled Carbon Nanotubes (SWCNT). A novel mold with two cavities and two different micropatterns was designed and tested as a proof-of-concept using Low-Force Stereolithography-based additive manufacturing (AM). The effect SWCNT concentrations (3 wt.%, 4 wt.%, and 5 wt.%) on the mechanical properties were characterized by quasi-static axial deformation tests, which allowed them to stretch up to ~160%. The elastomeric soft material’s hysteresis energy (Mullin’s effect) was fitted using the Ogden–Roxburgh model and the Nelder–Mead algorithm. The assessment showed that the resulting multilayer material exhibits high flexibility and high conductivity (surface resistivity ~7.97 × 104 Ω/sq) and that robust soft tooling can be used for other devices.

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Section: Resultsmentioning

confidence: 99%

E-Skin Development and Prototyping via Soft Tooling and Composites with Silicone Rubber and Carbon Nanotubes

et al. 2021

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“…1(b)-(d)). As for the complicated structure with insert, holes and different thicknesses, we resembled the principle of efficiency and cost of the factory and applied them to design heating lines, cooling lines and heating manners [2,5,16,17]. The heat lines (fig.…”

Section: Rhcm Mold Design Of An Automobile Spare Part 21 Injection Mold Structurementioning

confidence: 99%

“…One is heat generation source and the other is heat conduction that takes effect through appropriate boundary conditions [2]. Among all possible heat sources, electrical rod heating is the most widely used [2,[14][15][16][17][18][19][20][21][22]. The heat transfer process of the entire RHCM system is a three-dimensional transient heat conduction problem with an internal heat source.…”

Section: Thermal Analysismentioning

confidence: 99%

Optimization and application of temperature field in rapid heat cycling molding

Hao

2022

THERM SCI

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The rapid thermal cycle molding (RHCM) belongs to the injection mold temperature control system which is helpful to improve mold ability and enhance part quality. Despite many available literatures, RHCM does not represent a well-developed area of practice. The challenge is the uneven distribution of temperature in the cavity after heating, which mostly leads to defects on the surface of the products. In order to obtain uniform cavity surface temperature distribution of RHCM, the power of heating rods of the electric-heating system in an injection mold was optimized by the response surface method(RSM) in this work. The proposed optimization result was applied to design a complex RHCM injection mold with side core-pulling, holes and different thickness of an automotive part to verify its effectiveness by injection molding. Compared with initial design, the mold temperature uniformity was remarkably improvedby79%. Based on the optimization and injection molding numerical simulation results, the workable molding process to weaken the weld-lines effects on the quality was suggested and the practical injection molded parts were well produced.

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“…Intelligent cement-based composite materials that have been used currently include navigation cement-based composite materials, self-repairing cement-based composite materials, and temperaturemonitoring cement-based composite materials. Among them, navigation cement-based composites are widely used in automobiles, and can be used to determine the specific driving route of automobiles with the assistance of electromagnetic waves; [118] while self-repairing cementbased composites incorporate hollow capsules containing binders in composites. Once cracking occurs, it can be re-healed; temperature self-monitoring cement-based composite materials mainly rely on electrothermal effect and thermoelectric effect, and monitoring is implemented due to the changes in internal temperature.…”

Section: Cement-based Composite Materials Injection Moldingmentioning

confidence: 99%

Overview of Injection Molding Technology for Processing Polymers and Their Composites

Fu¹,

Xu²,

Liu³

et al. 2020

ES Mater.Manuf.

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Injection molding technology has been in development for almost 150 years. Injection molding is a molding technology that melts the material with the aid of a screw and an external heating device and then injects it into a mold to form the corresponding product as the mold cools. At present, many types of materials can be used to mold products by injection molding. Many requirements and problems in the processing of different materials have also caursed the birth of many molding processes. At present, injection molding has been applied in many fields, from daily necessities that are closely related to our lives to parts and components in the aerospace field. At present, injection molding still faces the challenges of processing new materials, and the continuous improvement of the existing equipment technology is required for the continuous development of injection molding.

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Thermal analysis based method development for novel rapid tooling applications

Cited by 23 publications

References 26 publications

E-Skin Development and Prototyping via Soft Tooling and Composites with Silicone Rubber and Carbon Nanotubes

E-Skin Development and Prototyping via Soft Tooling and Composites with Silicone Rubber and Carbon Nanotubes

Optimization and application of temperature field in rapid heat cycling molding

Overview of Injection Molding Technology for Processing Polymers and Their Composites

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