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Finishing Mediums And Finishing Suspensions

a technology of finishing suspension and finishing medium, which is applied in the direction of manufacturing tools, additive manufacturing processes, other chemical processes, etc., can solve the problems of unfinished surfaces, difficult scaling, and rough surfaces of objects created by amt processes

Inactive Publication Date: 2019-10-24
POSTPROCESS TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present patent describes a finishing medium and a finishing suspension for removing support material and surface finishing objects made by additive manufacturing techniques. The finishing medium is a combination of a finishing suspension and media particles, which provide both mechanical and chemical means for finishing. The media particles can be made of various shapes and sizes, and can be added in different ratios to achieve the desired abrasion and polishing effects. The finishing medium also includes a polyol, an anti-corrosion agent, and a hydrotrope. The use of these components helps to improve the efficiency and quality of the finishing process.

Problems solved by technology

In addition, objects created by an AMT process can have rough, unfinished surfaces.
Prior methods of finishing rely on techniques that require a person to apply and manage the finishing procedure, often on an object-by-object basis, which is expensive, inconsistent, and does not scale easily when production runs are larger than only a few objects.

Method used

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  • Finishing Mediums And Finishing Suspensions
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  • Finishing Mediums And Finishing Suspensions

Examples

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example 1

[0095]This example describes a method of using a finishing medium / suspension that is in keeping with the invention.

[0096]The AMT Object in FIG. 1A and FIG. 1B was printed by a DMLS process known in the art. The object, which was made from Ti6A14V, was finished using a finishing medium having:[0097](a) 10% by weight propylene glycol;[0098](b) 10% by weight triethanolamine;[0099](c) 4% by weight a 40% by weight aqueous solution of sodium xylene sulfonate; and[0100](d) the remainder was water.[0101]Such a finishing medium had a pH of about 8. The finishing medium was combined with 36 grit (450 μm) aluminum oxide media particles. The resulting finishing suspension was initially heated to a temperature of about 80° F. and the AMT Object was abraded by spraying the finishing suspension at the object at a pressure of 35 psi. Air was supplied to the finishing suspension through an orifice located prior to the nozzle. Upstream of the orifice, the air pressure was 70 psi. The finishing suspen...

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Abstract

Described are finishing mediums for removing support material and / or for surface finishing of objects made via additive manufacturing techniques. The finishing medium is an aqueous solution containing 1-20% by weight a polyol, 1-20% by weight an anti-corrosion agent, 0.001-10% by weight a hydrotrope. The finishing medium may optionally suspend media particles, thereby forming a finishing suspension. Also described are methods of using the finishing media and finishing suspensions described herein.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of U.S. Provisional Application No. 62 / 660,740 filed on Apr. 20, 2018, the disclosure of which is hereby incorporated by reference.FIELD OF THE DISCLOSURE[0002]This application relates generally to finishing mediums for removing support material and / or for surface finishing of objects made via additive manufacturing techniques (“AMT”). Some additive manufacturing techniques are commonly referred to as “3D-printing.” Such 3D-printing techniques include Polyjet, fused deposition modeling (FDM), selective laser sintering (SLS), stereolithography (SLA), multi jet fusion (MJF), direct metal laser sintering (DMLS), binder jetting, and others.BACKGROUND OF THE DISCLOSURE[0003]AMT processes are normally carried out by a computer-controlled device (e.g., a printer) that creates an object (an “AMT Object”) by sequentially applying material. That is, an AMT Object is “printed,” for example, using an inkjet printer...

Claims

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Application Information

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IPC IPC(8): C09G1/02B33Y40/00B24C1/08
CPCC09G1/02B33Y40/00B24C1/083B24C11/00B24C11/005B33Y40/20Y02P10/25C09K3/1454B29C64/40B29C64/10B33Y10/00
Inventor HUTCHINSON, DANIEL JOSHUAFARFAGLIA, MARCGRANT, CASSIDY
Owner POSTPROCESS TECH INC