The design of conformal cooling channels in injection molding tooling
The design of conformal cooling channels in injection molding tooling
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DOI：
10.1002/pen.10827
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发表时间：
2001-07-01
影响因子：
3.2
通讯作者：
Allen, S
中科院分区：
文献类型：
--
作者：
Xu, XR;Sachs, E;Allen, S
Solid Free Form制造技术已经证明了生产带有冷却通道的模具的潜力，冷却通道与成型型腔共形。与传统生产工具相比，具有保形冷却通道的3D打印工具在生产率和零件质量方面显示出同步的改进。可以创建高性能和高复杂性的保形冷却线，从而向模具设计者提出了挑战。提出了一种系统化、模块化的保形冷却通道设计方法。冷却是刀具表面的局部冷却，因此刀具被划分为几何区域，并为每个区域设计了通道系统。每个通道系统本身都被建模为由冷却元件组成，通常是由两个通道跨越的区域。应用了六个准则，包括：瞬时换热条件，它规定了从模具表面到冷却通道的最大距离；考虑沿流动通道的压力和温度降；以及考虑模具的强度。这些标准被视为约束条件，并寻求定义受这些约束约束的窗的成功设计。通过对注射成型复杂型芯和型腔的应用，验证了该方法的有效性。
Solid Freeform Fabrication technologies have demonstrated the potential to produce tooling with cooling channels, which are conformal to the molding cavity. 3D Printed tools with conformal cooling channels have demonstrated simultaneous improvements in production rate and part quality as compared with conventional production tools. Conformal cooling lines of high performance and high complexity can be created, thus presenting a challenge to the tooling designer. A systematic, modular approach to the design of conformal cooling channels is presented. Cooling is local to the surface of the tool, so the tool is divided into geometric regions and a channel system is designed for each region. Each channel system is itself modeled as composed of cooling elements, typically the region spanned by two channels. Six criteria are applied, including: a transient heat transfer condition, which dictates a maximum distance from mold surface to cooling channel; considerations of pressure and temperature drop along the flow channel; and considerations of the strength of the mold. These criteria are treated as constraints, and successful designs are sought that define windows bounded by these constraints. The methodology is demonstrated through application to a complex core and cavity for injection molding.