Warpage of a Large-Sized Orthogonal Stiffened Plate Produced by Injection Molding and Injection Compression Molding

被引：13
作者：
Lee, Sung Hee [2 ]
Kim, Seong Yun [1 ]
Youn, Jae Ryoun [1 ]
Kim, Baek Jin [2 ]
机构：
[1] Seoul Natl Univ, Dept Mat Sci & Engn, RIAM, Seoul 151744, South Korea
[2] Korea Inst Ind Technol, Precis Molds & Dies Team, Inchon 460840, South Korea
来源：
JOURNAL OF APPLIED POLYMER SCIENCE | 2010年 / 116卷 / 06期
关键词：
molding; plastics; simulations; stress; PART WALL THICKNESSES; RESIDUAL-STRESS; REDUCE WARPAGE; MOLDED PART; PREDICTION; SIMULATION; BEHAVIOR;
D O I：
10.1002/app.31873
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Rectangular plates of the size of 1800 x 600 x 12 mm(3) and 1200 x 600 x 12 mm(3) were selected for injection molding and injection compression molding, respectively, in order to investigate warpage characteristics of the large-sized polymer plates with orthogonal stiffener. To determine the mold system and to reduce warpage of the specimen, numerical analyses for injection molding and injection compression molding were performed by using a commercial simulation code. Experiments were performed to verify the suggested mold system and warpage of the specimen. Relatively large warpage of the injection molded product was observed and small warpage of the injection compression molded product was generated. Compression force of the injection compression molding was only 6% of the clamp force of the injection molding. Warpage of the product was reduced significantly by using the injection compression molding. The injection compression molding will be used to substitute expensive and disused wood forms with inexpensive and recyclable polymer plates for concrete casting. (C) 2010 Wiley Periodicals, Inc. J Appl Polym Sci 116: 3460-3467, 2010
引用
收藏
页码：3460 / 3467
页数：8
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