Questions related to Rapid Prototyping
A kind of surface roughness is produced by the application of laser energy density at high laser power (> 140W) which looks like an open porous structure. This kind of structure is not observed at lower laser power.
Is it produced due to oxidation of the layer? Or could it be a sign of instability at high laser power?
I will do my research in eyewear industry to develop a new innovative business model that will transform the optics industry by rapid prototyping and mass customisation. Any suggestions / gaps on this topic or even gaps in different industries that will have potential to be distrupted by additive manufacturing will be much appreciated.
I am exploring different methods to 3D print a transparent human nasal cavity using additive manufacturing techniques? Now according to me, it can be done through rapid prototyping. However there are different methods of 3D printing such as:
1. Selective laser sintering
2. Selective laser melting
3. Fused deposition modelling
So, which is the best out of these three to print a transparent human nasal cavity? By transparent i mean in which inner structure of human nose are visible.
I want to know the exact technique and the raw materials, which will be required and will be most suitable for this job.
I prepared solvent of PHBV and PLGA in methylene chloride. The resulting slurry was then cast into a Petri dish and dried. The resulting film was used to fabricate composite scaffolds using the rapid prototyping device. Is there any physicochemical data which tell which of two polymers will be on the surface after the 3D printing?
I am preparing RADseq libraries. I am shearing digested DNA (mean size 4096bp) using a Covaris ME220. The shearing is not working as fast as it should (compared to undigested DNA). Does anyone have any experience shearing digested DNA?
There are also the residuals from the digesting and ligations steps in the tube (rATP, enzymes, buffer etc). I assume this will also affect the efficacy, but I don't know how much. Hopefully I do not have to purify before shearing.
Thank you in advance for any help,
for a project on 3D printing I need to find out as many journals as possible related to 3D printing, additive manufacturing and rapid prototyping; i.e. the articles must be mainly on these topics.
Till now, I have found the following:
3D Printing and Additive Manufacturing
Rapid Prototyping Journal
International Journal of CAD/CAM
International journal of rapid manufacturing
RTejournal (Rapid Technology Electronic Journal)
Virtual and Physical Prototyping
Also any other reliable sources (scientific magazines etc.) targeting these topics would be appreciated as well.
The additive manufacturing (AM) industry is still relatively new, but growing at a great pace. The capabilities of 3D printing/rapid prototyping/additive manufacturing is very exciting to me yet I am concerned about all the new types of polymers that are being used in this industry and some are not biodegradable. With powder-based AM (PA2200 for example), I have been told that a large portion of the excess powder not used in the printed part, cannot be reused. With fused deposition modeling (FDM), a large amount of support material is often required which also goes to waste. I have read many studies on the impact of non-biodegradable plastics/polymers on our environment and I am avraid that this exciting new technology will contribute so much more to this environmental problem. So I want to find out if this issue has been investigated and if there are ways in which we can reduce (or even eliminate) the plastic/polymer waste generated by the AM industry.
A frequent application is power electronics rapid prototyping, but many other are possible. A closer look for actual applications in the industry seems to be rare. This discussion can be highly useful for tackling practical applications.
Any test part which would be best suited for testing part quality in FDM 3d printing. Quality parameters can be dimensional accuracy, surface roughness, overhang and scaffolds. The material being used for printing is PLA and the printer is Leapfrog XEED. Interface used is simplify 3D.
I would be varying the quality relevant parameters for this work piece to find out the effects and finding out the best working parameters.
In the process of developing an undergraduate and graduate level 3D Printing (additive manufacturing) course. I need a at least one good lecture book for the class,and a book for case studies.
I want to make a shaft. The shaft is having peculiar profile.
Using the fast-prototyping methods, is it possible to prepare a shaft and then further heat-treat it using conventional heat treatments?
Is it possible to achieve hardness of 50-52 HRC using fast-prototyping itself?
Currently I am trying to assemble these parts with a fully threaded rod. I don't think this will work good. Please don't suggest to assemble theses two parts with screws. I need better assembling option than this. I need solutions similar to press fit , snap fit etc...Consider Rapid prototyping limitations while suggesting solutions.
In my research I am designing a femoral knee component. I found a simple calculation in the paper entitled: "Custom Design of Knee Joint Prosthesis by Using Computerized Tomography (CT) Images and 3D Modelling," in which the authors calculated the required thickness using a cantilever beam. This is shown in page 4 and 5, on the journal paper attached.
Can anyone tell me if there are other methods to determining the minimum thickness of the femoral component? An FEA model will be later used, but first I want to determine the thickness of the femoral component based on a calculation.
I want to know how to layup carbon fiber with polypropelene for making composite. Also focus on the fortus machine which performed this work?
Is there any way/experimental procedure by which we can determine the coefficient of thermal expansion of PLA parts made with a FDM machine?
I am facing a very serious problem in dealing with powder preparation for a few months. Existing ZCorp gypsum powder ZP102 and ZP130 are meant for prototype therefore it is not suitable to make bioceramic scaffold. While ZB binder (ZCorp's binder brand) is not so suitable as binding liquid for my topic. I am required to use other types of powder typically bioceramic powder to fabricate a scaffold. Since I am unable to disturb the binder system, therefore the only solution I have is by using water as binder/reactive liquid. I have a problem regarding powder preparation.
According to the various papers, the powder was prepared by incorporating the polymeric binder into the powder by means of wet mixing (ball milling), spray dry and mechanical mixing (dry mixing), while water is used as the reactive liquid. However, I am curious as to how ZP powder appears in irregular forms (equiaxial,rectangular) and is coated with the binder. How am I able to produce my powder into something like this?
I have attached the SEM image of ZP 130 obtained from Andrea Butscher's Printability Of Calcium Phosphate Powders For Three-Dimensional Printing Of Tissue Engineering Scaffolds.
I hope somebody able to help and advise me.
I am working on a study of embedded system. I am particularly interested in embedded system design using FPGA. Some articles suggest FPGA for rapid prototyping of an embedded system design. I couldn't come to a clear understanding of what prototyping mean in embedded system; and how using FPGA could be the fastest method for the so called "embedded system prototyping". I would like to have an explanation with good examples.
Any suggestions, and or possible solutions for the following.
Decreasing maintenance intervals: Turbine component materials in relation to cavitation decay and wear of high friction areas. Bearings etc.
Increasing overall efficiency: Exotic turbine compressor blades. High steam press and low steam press expansion-contraction zones to increase vacuum pressures and stable boundary layer effects.
Designing modular components: Speed up the unscheduled repair time. IE rapid prototyping techniques and processes.
I would like to convert medical DICOM data to 3D surface data (STL, IGES) for three dimensional analysis and rapid prototyping for TAVI simulation (transcatheter aortic valve implantation).
Powder's hydrophilicity is important when it interacts with the binder for 3D printing application. At my best knowledge, hydrophilicity is normally determined by contact angle. But how about powders? Some researchers had done wettability test by dropping binder into a powder bed and recorded it with high speed camera. But that only how good is the powder bed packing factor that very connected with powder size. Does anyone have any idea how to determine the hydrophilicity of the powder?
I am working on the thermal simulation of rapid prototyping processes where I need to activate elements based on time. How can I do this?
As per my knowledge I have to create an element table with two columns: namely element number and time of its birth. I am not able to enter the time of birth.
Layer thickness and saturation level (binder/ volume ratio) parameter appeared mostly on all journals that I've read. However, I am not sure what is saturation level is all about. Anyone can explain? Any reference that I can read about this parameter
These two terminology have been used widely in many research. So, what is the difference between RP and AM? since both also uses addtive material and RP machine.
I am doing transient thermal analysis of rapid prototyping and I am having a problem with script writing, which is used for the continuous element activation process. I want the process to be continued for several stages. Can anyone with expertise in this field some advice?
Solid based rapid prototyping, in which solid polymer is heated and melted in a mixing chamber and three dimensional object is printed in form of layers.
With so many 3D printers being produced and sold today, I'd be thrilled to read an article which goes into modest technical depth on the various technologies, pros / cons, capabilities, precision, machine cost, etc. Additionally, it'd be great to know what atypical industries are beginning to use them as their costs drop. Fuse Deposition Modeling (FDM) and laser sintering are becoming fairly popular but I'd love to know of any other technologies being developed or stirring interest. Many thanks in advance!