Work Item
ASTM WK75265
New Guide for Additive Manufacturing of Polymers -- Powder Bed Fusion -- Guidelines for Feedstock Recycling and Sampling Strategies
1. Scope
The purpose of this standard is to provide guidance to polymer powder bed fusion (PBF) users on best practice for recycling their polymer powder feedstock after having been used in the PBF process. It will outline optimal strategies for evaluating their recycled powder and how incorporating recycled power into their future builds can affect the performance of the parts being created in the additive manufacturing process.
Keywords
Powder Bed Fusion; polymer powder; recycling guidance; polymer powder evaluation
Rationale
In PBF, polymeric powder is used to create a 3 dimensional components in a layer-by-layer process. Any excess powder involved in the process is typically recycled and potentially re-used in subsequent manufacturing runs. Although PBF users are currently using their own or manufacturer advised processes, there are still challenges for recycling and re-use that need to be overcome. These challenges are as follows: 1.There is no standard procedure to evaluate recycled polymer powder quality 2.There are no existing standards on whether or not a used feedstock can be recycled/re-used 3.There is no published best-practice for using recycled powder and how to incorporate used powder in future builds This guide will address these challenges and provide guidance on best-practice for the recycling/re-use of polymers powders for use within PBF.
The title and scope are in draft form and are under development within this ASTM Committee.
Work Item Status
Date Initiated: 12-22-2020
Technical Contact: Edward Cant
Item: 001
Ballot: F42.05 (21-03)
Status: Will Reballot Item
Item: 001
Ballot: F42 (22-05)
Status: Will Reballot Item