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首页> 外文会议>ASME international design engineering technical conferences and computers and information in engineering conference 2014 >DESIGN OF AN ENDOSCOPIC MICRO OPTICAL PART FOR FABRICATION WITH MICRO TWO SHOT INJECTION MOULDING
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DESIGN OF AN ENDOSCOPIC MICRO OPTICAL PART FOR FABRICATION WITH MICRO TWO SHOT INJECTION MOULDING

机译：两次注射成型的内镜微光学零件的设计

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摘要

Micro two shot injection moulding (μtwo shot IM) is a manufacturing process capable of simultaneously replicating two polymeric parts and assembling them; removing the requirement for costly micro assembly. Endoscopes are used in medical environments to observe areas that are otherwise unobservable. μTwo shot IM has the potential to simultaneously replicate and assemble polymer lenses for endoscope imaging and assembling them to their required housing. In view of this, this paper contributes a case study part for application of μtwo shot injection moulding in the fabrication of an endoscopic micro optical component. This paper covers several aspects involved in the design of such a part. This novel design concept consists of an optical component and a housing component moulded sequentially on top of each other using μtwo shot IM. The lens component consisted of three lenses with a common base moulded as the first shot. The second shot moulded on onto the optical component was the housing component incorporating an external thread for interchangeability. From a material selection exercise it was concluded that cyclic olefin copolymer (COC) shall be used as the optical material and polyoxymethylene (POM) shall be used as the housing material. One major concern in the design of such a part is the deformation of the optical material by the housing material due to softening via heat transfer. Simulations of such a scenario were carried out and it was indicated that the functionality of the optical material shall not be compromised.
机译：微型二次注塑成型（μtwoIM）是一种能够同时复制两个聚合物部件并将其组装的制造工艺。消除了昂贵的微型装配的需求。内窥镜在医疗环境中用于观察否则无法观察到的区域。 μTwoShot IM可以同时复制和组装用于内窥镜成像的聚合物透镜，并将其组装到所需的外壳中。有鉴于此，本文提供了一个案例研究部分，用于在内窥镜微光学元件的制造中应用μtwo注射注射成型。本文涵盖了该零件设计中涉及的几个方面。这个新颖的设计概念包括一个光学组件和一个外壳组件，它们使用μtwoshotIM依次模压在彼此的顶部。镜头组件由三片镜头组成，它们的共同底座是第一张照片。模制在光学组件上的第二个镜头是装有可互换性的外螺纹的外壳组件。通过材料选择得出的结论是，应将环状烯烃共聚物（COC）用作光学材料，并将聚甲醛（POM）用作外壳材料。这种部件的设计中的一个主要关注是光学材料由于通过传热而软化而由外壳材料变形。对这种情况进行了仿真，结果表明光学材料的功能不应受到损害。

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