The behaviour of micro-injection moulding inserts produced with material jetting technology

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering Pub Date : 2024-10-24 DOI:10.1016/j.compositesb.2024.111913

B. Stampone , L. Giorleo , G. Trotta

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引用次数: 0

Abstract

The increasing interest in additive manufacturing and advancements in precision and production quality have sparked attention to its use in industrial prototyping. High-performance polymer resins enhance flexibility in mass production processes like micro-injection moulding. This flexibility allows for reconfigurable moulds using resin inserts, enabling the transition of devices, such as microfluidics, from labs to large-scale production. Despite progress, limitations exist in additive manufacturing, including the minimum size of microstructures and the brittle behaviour of resin inserts during moulding cycles, impacting overall production capacity. This study focuses on using a micro-injection moulding machine to reproduce PMMA thin plates with single straight microchannels (250 μm) and with different side wall angles (0°, 15°, and 30°), investigating the best compromise between capability and insert resistance to moulding cycles. A careful study of the dynamics leading to the insert failure and the resin limits was carried out. The results showed that it is possible to produce about 15 micro-structured thin plates with good accuracy using a resin insert realised with Material Jetting technology.

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利用材料喷射技术生产的微型注塑成型镶件的性能

人们对快速成型制造的兴趣与日俱增，其在精度和生产质量方面的进步也引发了人们对其在工业原型制作中应用的关注。高性能聚合物树脂提高了微注塑等大规模生产工艺的灵活性。这种灵活性允许使用树脂嵌件重新配置模具，从而实现微流控等设备从实验室到大规模生产的过渡。尽管取得了进展，但增材制造仍存在局限性，包括微结构的最小尺寸和树脂镶件在成型周期中的脆性，从而影响了整体生产能力。本研究的重点是使用微型注塑成型机复制具有单个直微通道（250 μm）和不同侧壁角度（0°、15° 和 30°）的 PMMA 薄板，研究成型能力和嵌件对成型循环的耐受性之间的最佳折衷。对导致镶件失效的动力学和树脂极限进行了仔细研究。结果表明，利用材料喷射技术实现的树脂镶件可以生产出 15 块左右的微结构薄板，而且精度很高。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Composites Part B: Engineering 工程技术-材料科学：复合

CiteScore

24.40

自引率

11.50%

发文量

784

审稿时长

21 days

期刊介绍： Composites Part B: Engineering is a journal that publishes impactful research of high quality on composite materials. This research is supported by fundamental mechanics and materials science and engineering approaches. The targeted research can cover a wide range of length scales, ranging from nano to micro and meso, and even to the full product and structure level. The journal specifically focuses on engineering applications that involve high performance composites. These applications can range from low volume and high cost to high volume and low cost composite development. The main goal of the journal is to provide a platform for the prompt publication of original and high quality research. The emphasis is on design, development, modeling, validation, and manufacturing of engineering details and concepts. The journal welcomes both basic research papers and proposals for review articles. Authors are encouraged to address challenges across various application areas. These areas include, but are not limited to, aerospace, automotive, and other surface transportation. The journal also covers energy-related applications, with a focus on renewable energy. Other application areas include infrastructure, off-shore and maritime projects, health care technology, and recreational products.