Diagnosis of multi-stage injection molding process by ultrasonic technology at a T-shape extension nozzle

Cheng, Chin‐Chi; Wu, Yilin

doi:10.1016/j.jmatprotec.2020.116650

Cited by 9 publications

(4 citation statements)

References 10 publications

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“…The fundamental aspects to consider for IM are the machine specifications and the material to be used. Optimizing these aspects can ensure the reduction of defects and the quality of the final products [143]. An injection molding machine has a motor.…”

Section: Parts Of An Injection Molding Machinementioning

confidence: 99%

Polymeric Materials Obtained by Extrusion and Injection Molding from Lignocellulosic Agroindustrial Biomass

Pacheco,

Evangelista-Osorio,

Muchaypiña-Flores

et al. 2023

Polymers

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This review presents the advances in polymeric materials achieved by extrusion and injection molding from lignocellulosic agroindustrial biomass. Biomass, which is derived from agricultural and industrial waste, is a renewable and abundant feedstock that contains mainly cellulose, hemicellulose, and lignin. To improve the properties and functions of polymeric materials, cellulose is subjected to a variety of modifications. The most common modifications are surface modification, grafting, chemical procedures, and molecule chemical grafting. Injection molding and extrusion technologies are crucial in shaping and manufacturing polymer composites, with precise control over the process and material selection. Furthermore, injection molding involves four phases: plasticization, injection, cooling, and ejection, with a focus on energy efficiency. Fundamental aspects of an injection molding machine, such as the motor, hopper, heating units, nozzle, and clamping unit, are discussed. Extrusion technology, commonly used as a preliminary step to injection molding, presents challenges regarding fiber reinforcement and stress accumulation, while lignin-based polymeric materials are challenging due to their hydrophobicity. The diverse applications of these biodegradable materials include automotive industries, construction, food packaging, and various consumer goods. Polymeric materials are positioned to offer even bigger contributions to sustainable and eco-friendly solutions in the future, as research and development continues.

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Section: Parts Of An Injection Molding Machinementioning

confidence: 99%

Polymeric Materials Obtained by Extrusion and Injection Molding from Lignocellulosic Agroindustrial Biomass

Pacheco,

Evangelista-Osorio,

Muchaypiña-Flores

et al. 2023

Polymers

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show abstract

“…Recently, in 2020, Cheng et al [ 52 ] further developed the research on the application of a T-shaped extension nozzle by investigating the effect of material type and various process settings on the part quality. Two HTUTs were fabricated on the extension nozzle and different injection speeds and heating temperatures were investigated for Polypropylene (PP) and ABS.…”

Section: High-temperature Ultrasonic Transducers (Htut) By Sol-gel Techniquementioning

confidence: 99%

“… ( a ) Fabricated sol-gel UTs at the nozzle and Mould insert; ( b ) The velocity and amplitude of ultrasonic sensor vs. Process time [ 52 ]. …”

Section: Figurementioning

confidence: 99%

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Ultrasound Sensors for Process Monitoring in Injection Moulding

Kariminejad

Tormey

Huq

et al. 2021

Sensors

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Injection moulding is an extremely important industrial process, being one of the most commonly-used plastic formation techniques. However, the industry faces many current challenges associated with demands for greater product customisation, higher precision and, most urgently, a shift towards more sustainable materials and processing. Accurate real-time sensing of the material and part properties during processing is key to achieving rapid process optimisation and set-up, reducing down-times, and reducing waste material and energy in the production of defective products. While most commercial processes rely on point measurements of pressure and temperature, ultrasound transducers represent a non-invasive and non-destructive source of rich information on the mould, the cavity and the polymer melt, and its morphology, which affect critical quality parameters such as shrinkage and warpage. In this paper the relationship between polymer properties and the propagation of ultrasonic waves is described and the application of ultrasound measurements in injection moulding is evaluated. The principles and operation of both conventional and high temperature ultrasound transducers (HTUTs) are reviewed together with their impact on improving the efficiency of the injection moulding process. The benefits and challenges associated with the recent development of sol-gel methods for HTUT fabrication are described together with a synopsis of further research and development needed to ensure a greater industrial uptake of ultrasonic sensing in injection moulding.

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Analysis of Melt Processing Systems

2021

Plastics Process Analysis, Instrumentation, and Control

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Diagnosis of multi-stage injection molding process by ultrasonic technology at a T-shape extension nozzle

Cited by 9 publications

References 10 publications

Polymeric Materials Obtained by Extrusion and Injection Molding from Lignocellulosic Agroindustrial Biomass

Polymeric Materials Obtained by Extrusion and Injection Molding from Lignocellulosic Agroindustrial Biomass

Ultrasound Sensors for Process Monitoring in Injection Moulding

Analysis of Melt Processing Systems

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