Development of an Injection Mold for Liquid Silicone Rubber Using Rapid Tooling Technology

Kuo, Chil-Chyuan; Lin, Jianming

doi:10.1080/23080477.2019.1596869

Cited by 2 publications

(1 citation statement)

References 33 publications

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“…In comparison to standard injection molding for thermoplastics, the liquid injection molding process, includes a pump that mixes A and B components of liquid silicone rubber (LSR) and injects it into a heated mold cavity, where the LSR cures [ 23 , 24 ]. Typically, component A contains a platinum catalyst and component B contains methylhydrogensiloxane as a cross-linker and an alcohol inhibitor [ 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

Sensorized Robotic Skin Based on Piezoresistive Sensor Fiber Composites Produced with Injection Molding of Liquid Silicone

2021

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Soft robotics and flexible electronics are rising in popularity and can be used in many applications. However, there is still a need for processing routes that allow the upscaling in production for functional soft robotic parts in an industrial scale. In this study, injection molding of liquid silicone is suggested as a fabrication method for sensorized robotic skin based on sensor fiber composites. Sensor fibers based on thermoplastic elastomers with two different shore hardness (50A and 70A) are combined with different silicone materials. A mathematical model is used to predict the mechanical load transfer from the silicone matrix to the fiber and shows that the matrix of the lowest shore hardness should not be combined with the stiffer fiber. The sensor fiber composites are fixed on a 3D printed robotic finger. The sensorized robotic skin based on the composite with the 50A fiber in combination with pre-straining gives good sensor performance as well as a large elasticity. It is proposed that a miss-match in the mechanical properties between fiber sensor and matrix should be avoided in order to achieve low drift and relaxation. These findings can be used as guidelines for material selection for future sensor integrated soft robotic systems.

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Section: Introductionmentioning

confidence: 99%

Sensorized Robotic Skin Based on Piezoresistive Sensor Fiber Composites Produced with Injection Molding of Liquid Silicone

2021

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Sustainability Analysis of Rapid Tooling-Based Investment Casting: A Comprehensive Review

Vaghela

Valaki

Thanki

et al. 2023

Smart and Sustainable Manufacturing Systems

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Investment casting (IC) is the most precise and second most widely employed casting process after sand casting. Despite its huge application potential, the process has certain inherent techno-commercial drawbacks, such as taking a long time to market, poor material efficiency, high specific energy consumption, continuous human resource requirements, environmental emissions, etc. The development of tooling for IC processes is found to be the prime cause of the drawbacks. To overcome these drawbacks, the rapid prototyping (RP)-based tooling development (also called rapid tooling [RT]) approach has the potential to deal with the limitations of the IC. However, the performance and sustainability of the RP-based tooling need to be studied for their commercial level acceptance over traditional hard tooling. Authors in this review paper have comprehensively reviewed the research works related to sustainability analysis of IC tooling developed through RP processes. Most research studies focus on specific energy consumption or life cycle analysis for sustainability assessment of RT-IC. Manufacturing lead time, production cost, and surface finish are the most investigated parameters for RT-IC. The review highlighted that through the RT approach, lead time for product development can be reduced from months to weeks, overall cost savings of 50–90 % can be achieved, and environmental risk could be reduced up to 50 %. Moreover, it is also observed that fused deposition modeling is the first choice for the RT process, whereas acrylonitrile butadiene styrene and polylactic acid are the most frequently used materials for RT-based IC tooling development at the present time. Most of the research on RT is focused on energy consumption analysis, whereas operator safety and personal health, like social indicators, need further research attention. To understand the current research trends, a decision matrix has been prepared from the key research papers with a close resemblance to the theme of the current review paper.

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Development of an Injection Mold for Liquid Silicone Rubber Using Rapid Tooling Technology

Cited by 2 publications

References 33 publications

Sensorized Robotic Skin Based on Piezoresistive Sensor Fiber Composites Produced with Injection Molding of Liquid Silicone

Sensorized Robotic Skin Based on Piezoresistive Sensor Fiber Composites Produced with Injection Molding of Liquid Silicone

Sustainability Analysis of Rapid Tooling-Based Investment Casting: A Comprehensive Review

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