3D Printer
Additive manufacturing is rapidly gaining popularity around the world, but when it comes to the number of additive manufacturing companies, I'm afraid there is nowhere more than in the United States, where it originated. From 1987, when Chuck Hull first...
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Introduction: Today, with the development of 3D printing technology and the expansion of the application market, more and more fields such as aerospace, industrial production, dental and medical, furniture industry, etc. are gradually increasing their acceptance of 3D printing technology....
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In recent years, under the role of policy incentives and market promotion in various countries, 3D printing technology research and development speed has been accelerated, the industry hot spots frequently. Recently, Japan's success in the manufacture of 3D printing "and...
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FDM3D printer has the characteristics of fast entry, low cost, etc., the use of its creators players in the minority, but also because FDM printing has an inherent technical barrier, so most of the 3D model printed with FDM technology will have layer lines, next let me take a look at how to hide the FDM printing model layer lines it!
There will be the following types of laminar pattern in our printed models.
Cracks: mainly extrusion problems. The possibility of its one is the consumables, its two is the temperature, and its three is the feeding material.
Water ripples: Water ripples are caused by machine XY axis vibration, and the corners of the model will be more likely to appear. Generated by the following factors: printing speed is too fast, too high acceleration, mechanical vibration.
Step pattern: When the nozzle guide is not installed correctly or the cooling fan does not work or fails, resulting in the printed layer is not cooled in time, the new layer will be printed will be extruded and deformed. There are the following causes: model shaking, cooling is not timely, the machine movement components are not stable
Methods to eliminate the layer pattern
Wet sanding
Smoothing the surface with sandpaper (400 to 1,000 grit, depending on the roughness of the print) is recommended for the following three reasons.Sanding relies on friction, which generates heat and causes prints to warp and fade; a small amount of water or oil will prevent this.It's easy to scratch plastic, and wet sanding helps minimize the risk.Sanding produces many particles that are a breathing hazard. When wet sanding, many particles bind to the liquid, keeping them out of the air.
Apply wash resin
The wash resin is applied evenly to the surface, at which point the surface of the model becomes very smooth and can be washed directly after curing with an ultraviolet light, isn't that convenient! When you really want to make your 3D printed parts look professional, painting is the way to go. But as a handicapped person, how can I get the coloring perfect?
Brush painting method
Mix the acrylic paint and alcohol in the ratio of 1:1.2 with a stirrer, and then filter it with 400 mesh gauze after mixing, which can filter out the tiny impurities and avoid affecting the coloring, and use the cross-cross method when coloring, that is, when the first layer is almost dry, put on the second layer of fresh paint, and the brush direction of the second layer is vertical to the first layer.
Airbrush method
The same as the pen method, we still need to stir, filter, in order to avoid the clogging of the airbrush, we need to increase the proportion of alcohol to about 1.5, when spraying to adjust the spraying range of the airbrush, you can try spraying in the blank area, to the model spraying can be used multi-angle spraying, so that the model after spraying the color thickness will be more uniform.
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Introduction: Among any industry, the development and implementation of standards are of paramount importance to ensure the proper operation of certain components, systems or services. Today, additive manufacturing (AM) is gaining applications in many fields, so the performance of subsequent 3D printed parts this also needs to be controlled, including performance and biocompatibility. To meet these stringent requirements, post-processing of the original part produced by additive manufacturing is critical. The post-processing step of additive manufacturing eliminates defects and helps the user to obtain the desired performance.
Different post-processing solutions have emerged on the market to help 3D printed parts meet the certifications for different applications, allowing them to compete directly with traditional processes such as injection molding.
Whether it's making prosthetics, nasal swabs, dental braces or medical helmets, the healthcare industry has extremely stringent requirements for the quality, safety and performance of its parts. Within the additive manufacturing market, there are a number of post-processing methods that provide the smooth finishes necessary for applications in these areas. However, the real challenge lies in the treatment of the internal channels of the part. In fact, these channels remain exposed and bacteria can latch onto them and contaminate the production process. To solve this problem, AMT is offering an automated post-treatment system called "Vapor Smoothing" that provides a smooth and sealed surface finish for 3D printed parts. Thanks to this post-processing method, parts can pass different tests and prove their compliance with standards and regulations for industrial applications in multiple fields.
How Steam Smoothing Post-treatment Works
To understand how vapor smoothing post-processing enables 3D printed parts to meet standards in the most demanding industries such as medical, dental and automotive, it is first necessary to understand how the technology works.The vapor smoothing method developed by AMT involves suspending batches of parts in a sealed processing chamber where a proprietary solvent mixture is introduced in a closed-loop system in the form of vapor. The steam comes into contact with the parts, enveloping them and eliminating irregularities in their surfaces. By eliminating crack initiation sites, the steam smoothing process completely covers the surface of the part, thereby increasing elongation at break without loss of ultimate tensile strength. The vapor smoothing process can be used in additive manufacturing technologies such as selective laser sintering (SLS), multi-jet fusion (MJF), selective absorption fusion (SAF) and fused deposition modeling (FDM) to help achieve the desired surface roughness in the parts created. In terms of materials, AMT's solutions are compatible with a wide range of polymers, including polyamides (PA12, PA11 and PA6), flexible materials such as TPU, and more standard materials such as ABS.
In addition to being highly controllable and repeatable, AMT's vapor smoothing system allows complex geometries to be smoothed without compromising mechanical properties. In addition, it has many benefits that allow users to unlock additional applications for 3D printed parts for advanced industries. For example, it allows sealing surfaces to prevent the entry of liquids and gases. This prevents bacteria buildup, which increases the sterilization of the part. This surface smoothing has other benefits, notably, it is important for parts that come in contact with skin, such as prosthetics, nasal swabs, dental applications, etc. In addition to the benefits of smoothing, this technology also improves the mechanical properties of the parts, making them more durable, practical and resistant to wear and tear, thus extending their service life. This simultaneously improves the overall aesthetics of the part without affecting the final weight or dimensional changes.
Standards and Qualification Testing for 3D Printed Parts
3D printed parts for applications in industry need to be evaluated to ensure that these components are compatible and safe for their given application. In this case, to prove the success of this post-processing method, researchers tested the compatibility of 3D printed parts completed using AMT vapor smoothing technology. In the medical and dental fields, these components successfully passed various certifications related to skin contact, cytotoxicity and antimicrobial testing. These performance tests are demanding and complex, requiring multiple levels of certification to ensure patient safety. In addition, industries such as automotive and food have also tested parts that have undergone vapor smoothing treatments. In particular, the automotive industry has successfully passed flammability tests on parts made of PA12 material. Importantly, AMT's reprocessing systems meet all safety and industrial hygiene standards for demanding applications ranging from medical and dental to consumer and food. In addition, they do not use corrosive and explosive acid mixtures in the machine, thus minimizing any other potential hazards.
The use of standard highly controlled parts remains the focus of many industries that still deny the potential of 3D printing. Now, AMT's vapor smoothing technology makes it possible for 3D printed parts to be used in the most demanding industries by meeting the certifications of the most demanding industries.
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