中国塑料 ›› 2023, Vol. 37 ›› Issue (11): 74-80.DOI: 10.19491/j.issn.1001-9278.2023.11.008

• 加工与应用 • 上一篇    下一篇

基于顶部加热与分步制造的PDMS/SiC功能梯度材料3D打印成形规律研究

王洛唯, 杨建军(), 朱嘉乐   

  1. 青岛理工大学机械与汽车工程学院,山东 青岛 266520
  • 收稿日期:2023-05-26 出版日期:2023-11-26 发布日期:2023-11-22
  • 通讯作者: 杨建军(1977—),男,教授,从事3D打印、微纳增材制造、柔性电子方面研究,yjjdem@163.com
    E-mail:yjjdem@163.com
  • 基金资助:
    山东省自然科学基金项目(ZR2021ME139)

3D printing formation law of PDMS/SiC functionally graded materials based on top heating and step⁃by⁃step forming

WANG Luowei, YANG Jianjun(), ZHU Jialei   

  1. School of Mechanical and Automotive Engineering,Qingdao University of Technology,Qingdao 266520,China
  • Received:2023-05-26 Online:2023-11-26 Published:2023-11-22
  • Contact: YANG Jianjun E-mail:yjjdem@163.com

摘要:

聚二甲基硅氧烷(PDMS)基材料未固化状态下具有摊铺(流动浸润)特性,传统底部加热的固化方式无法满足及时固化的需求。针对此问题,以PDMS和碳化硅(SiC)粉末混合功能梯度材料为例,采用顶部与底板双重加热方式,提出了一种边框区与填充区两步3D打印的精密成形方法,探究了打印速度、气压、激光功率密度等工艺参数对不同SiC含量PDMS/SiC复合材料制造精度的影响规律。最终选取激光功率密度101.85 W/cm2时进行功能梯度样件打印。结果表明,采用分步打印方式制备的样件整体形貌优异,样件侧面倾角40°增大到80°,极大地提高了打印形状尺寸精度。

关键词: 分步3D打印, 顶部加热, 功能梯度材料

Abstract:

Polydimethylsiloxane (PDMS)⁃based material has a feature of spreading (flow infiltration) in the uncured state, and the traditional bottom heating curing method can not meet the requirement of timely curing. To solve this problem, a PDMS/silicon carbide (SiC) powder⁃mixed functional gradient material was taken as an example, and a two⁃step 3D printing precision forming method for border area and filling area was proposed by using a dual heating method on the top and bottom plate. The effects of the printing speed, air pressure, effect of laser power density, and other process parameters on the manufacturing accuracy of PDMS/SiC composites with different SiC contents were investigated. Finally, a laser power density of 101.85 W/cm2 was selected for the printing of the functional gradient sample. The results indicated that the overall morphology of the samples prepared by the multi⁃step printing method was excellent, and their side angle increased from 40° to 80°. This greatly improved the precision of the printed shapes and dimensions.

Key words: step?by?step 3D printing, top heating, functionally graded material

中图分类号: