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多喷气融合3D打印中的精度和粉末去除限制.

Karel Raz¹, Zdenek Chval¹, Petra Faitova¹

¹Faculty of Mechanical Engineering, Regional Technological Institute, University of West Bohemia, Univerzitni 2732/8, 301 00 Plzen, Czech Republic.

|October 28, 2025

概括

多喷气融合 (MJF) 打印显示,由于热变化,中心部件的准确性较低. 从格子结构中去除粉末受到密度的限制,低密度格子允许更深层次的清洁.

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科学领域:

添加剂制造添加剂制造添加剂制造
材料科学材料科学材料科学
机械工程机械工程

背景情况:

多喷气融合 (MJF) 是功能性聚合物零件的关键3D打印技术.
在实现高维度精度和有效去除MJF零件中复杂的内部几何形状的粉末方面仍然存在挑战.

研究的目的:

为了研究MJF打印零件的尺寸精度的空间变化.
量化MJF中未化粉末从内部格子结构中去除的局限性.

主要方法:

在HP MJF 4200打印机上生产了45个PA12标本,以映射整个构建体积的尺寸精度.
在以身体为中心的立方体 (BCC) 格子结构中,使用喷砂和X射线检查的量化粉末去除极限.

主要成果:

中部建造区域的零件显示出与周边区域相比,尺寸准确性较差.
格子相对密度和可清洗厚度之间存在强烈的反向关系;低密度格子 (ρ = 0.07) 允许清洗多达五层,而高密度格子 (ρ = 0.39-0.47) 仅限于1.5-1.7层.

结论:

不统一的热控制影响了MJF的尺寸精度,中心部分的精度较低.
部分放置和格子设计 (相对密度) 对于在MJF应用中成功去除粉末至关重要.

关键词:

通过3D打印打印3D打印.在MJF中,MJF是MJF.准确度准确度准确度准确度准确度这是一个格子格子.尼龙是什么意思尼龙是什么意思

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