人工耳蜗中继器下壳的模具设计

Injection Mold Designs for the Lower Shell of the Cochlear Implant Repeater

中继器是人工耳蜗的重要组成部分,其下壳的设计和制造对于整个系统的稳定性和可靠性有着重要影响。然而,传统的中继器下壳注塑周期较长(29.5 s),注塑过程中容易产生翘曲、缺料等问题,影响了产品的稳定性和可靠性。注塑模具设计不合理是造成上述问题的主要原因。本文通过合理的材料选型、全新的模具设计和优化的注塑工艺调控,实现了人工耳蜗中继器下壳的制作成型。通过运用西门子NX(UG)三维建模技术进行精细构造,同时结合自动计算机辅助设计(CAD)手段,构建了潜顶针式进浇口设计方案,并科学合理地设置了脱模系统、冷却系统、排气装置、斜顶机构以及定模滑块侧向分型结构。利用该模具设计加工人工耳蜗中继器下壳的注塑周期仅25.65 s,产品无翘曲、缺料等问题。本文设计的人工耳蜗中继器下壳模具能够有效解决传统模具注塑周期长、不良率高的问题,实现高效、稳定的产品生产,为同类型产品的模具设计提供了设计思路。

Repeater is an important component of cochlear implants.The designs and manufactures of their lower shells have a significant impact on the stability and reliability of the entire system.However,the traditional injection molding cycle for the lower shells of the repeaters is relatively long(29.5 s),which could easily cause problems such as warping and material shortage during the injection molding process,affecting the stability and reliability of the products.The unreasonable design of injection molds is the main reason for the above problems.This paper achieves the production and molding of the lower shells of the cochlear implant repeaters through reasonable material selections,new mold designs,and optimized injection molding process controls.By using Siemens NX(UG)3D modeling technology for fine construction and combining with automatic computer aided design(CAD)2D design methods,a design scheme for a submerged needle gate was constructed.The demolding system,cooling system,exhaust device,inclined top mechanism,and fixed mold slider lateral parting structure were scientifically and reasonably set up.The results show that the injection molding cycle of the product is only 25.65 s,and there are no defects such as warping and material shortage.The mold designed in this article could effectively solve the problems such as long injection cycle and high defect rate in the traditional injection processes of the product,which achieves efficient and stable product productions,and provides design ideas for the mold designs of similar products.