锻压技术

光固化注塑模模芯建造方式的优化研究

英文标题：Study on optimization of mold core build mode for stereolithography injection mold

作者：王永信冯路开梁晋刘光辉吴华英赵蒙

单位：西安交通大学

关键词：光固化快速模具注塑模建造方式

分类号：TG76

出版年,卷(期):页码：2015,40(11):77-81

摘要：

光固化注塑模模芯在脱模过程中极易发生拉伸破坏现象，从优化模芯强度出发，采用标准拉伸试样代替模芯，进行最优模芯强度的选择，以达到提高模芯寿命的目的。以C-UV 6651耐高温树脂为材料原型，通过光固化制作不同建造方向和分层厚度的标准拉伸试样，并对拉伸试样的拉伸强度进行对比分析。最终，实验验证了光固化成型方式制作的试样呈各向异性，确定了光固化拉伸试样的最佳建造方向为与拉伸方向平行，最佳分层厚度为0.05 mm。可将该实验结果应用于模芯制造中，以0.05 mm分层厚度和脱模方向建造模芯，以获得高强度、长寿命的模芯。

Tensile failure occurs easily in demoulding process of mold core for stereolithography injection mould. The selection of optimization mould core strength was conducted to improve the life of mould core by the standard tensile samples replacing mould core based on optimization mould core strength. The C-UV 6651 high temperature resistant resin was used as prototype material, standard tensile samples with different build orientations and layer thickness were produced and the tensile strength of the samples was analyzed. Finally, it is verified that the samples produced by stereolithography are anisotropic with the best build orientation of the sample parallelling to the stretch orientation and the best layer thickness of 0.05 mm. The experimental result can be applied to manufacture mould, and the mould core built in the direction of demoulding with the layer thickness of 0.05 mm can obtain higher strength and longer life.

基金项目：

国家自然科学基金资助项目（51421004、51275378、51275389）；中央高校基本科研业务费专项资金资助；广东省公益研究与能力建设专项资金资助(0104三维人体快速扫描系统的研发)

王永信（1966-），男，硕士，高级工程师

参考文献：

［1］李涤尘, 王永信, 卢秉恒. 快速成形技术发展状况与趋势[J]. 电加工与模具, 2009, (Z1): 23-27.Li D C, Wang Y X, Lu B H. Development state and trend of rapid prototyping technology[J]. Electromachining & Mould, 2009, (Z1): 23-27.
［2］王永信, 刘光辉, 梁晋, 等. 注射模光固化型芯快速制造关键技术研究[J]. 模具工业, 2015, 41(1): 51-56.Wang Y X,Liu G H,Liang J, et al. Research on key technology in the rapid manufacturing of stereolithography injection mold[J].Die & Mould Industry,2015, 41(1): 51-56.
［3］刘细芬，黄家广.基于Pro/E，Moldflow和MasterCAM平台下注射模的CAD/CAE/CAM[J]. 锻压技术，2008，33(4):92-95.Liu X F, Huang J G. Injection mould CAD/CAE/CAM based on Pro/E，Moldflow and MasterCAM [J].Forging & Stamping Technology, 2008，33(4):92-95.
［4］胡晓冬, 彭伟, 赵万华, 等. 直接模具制造技术的发展动态[J]. 航空制造技术, 2005, (10): 85-87,100.Hu X D, Peng W, Zhao W H, et al. Development of direct tooling manufacture[J]. Aeronautical Manufacturing Technology, 2005, (10): 85-87,100.
［5］Bártolo Paulo Jorge. Stereolithography: Materials, Processes and Applications[M]. Boston: Springer, 2011.
［6］Nambiar RV, Lee K H, Nagarajan D. Stereolithography mold life extension using gas-assisted injection[J]. Rapid Prototyping Journal, 2007, 13 (2): 92-98.
［7］Palmer A E, Colton J S. Failure mechanisms in stereolithography injection molding tooling[J]. Polymer Engineering & Science, 2000, 40 (6): 1395-1404.
［8］Colton J S, Crawford J, Pham G, et al. Failure of rapid prototype molds during injection molding[J]. CIRP Annals - Manufacturing Technology, 2001, 50 (1): 129-132.
［9］Harris R A. Layer thickness and draft angle selection for stereolithography injection mould tooling[J]. International Journal of Production Research, 2002, 40 (3): 719-729.
［10］Griffiths C A, Dimov S S, Fischer S, et al. Micro-stereolithography tools for small-batch manufacture of polymer micro-parts[J]. Proceedings of the Institution of Mechanical Engineers Part B-Journal of Engineering Manufacture, 2012, 226 (B4): 708-721.
［11］Puebla K, Arcaute K, Quintana R, et al. Effects of environmental conditions, aging, and build orientations on the mechanical properties of ASTM type I specimens manufactured via stereolithography[J]. Rapid Prototyping Journal, 2012, 18 (5): 374-388.
［12］GB/T 1040—2006,塑料拉伸性能的测定[S].GB/T 1040—2006, Determination of the tensile properties of plastics[S].

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