Working: All the 3D printers’ posses five basic process functions for creating a three-dimensional model.

First – The Print Surface is fed with a unique powder.

Second – The powder is spread on print surface by a roller at a preset depth. This process takes just a few seconds for its completion.

Third – Color is applied to the powder’s initial layer by the Standard Inkjet Print Heads.

Fourth – The solidification of powdered layer takes place.

Fifth – The lowering of print surface for powder’s another layer is enabled.

This process goes on repeating till the completion of the whole 3D model occurs. The mixture of Ink Jet Color and powder results in formation of a bond. The solidification occurs this way. So, if no printing is carried out at the specified layer or location, the powder retains its state, i.e. it does not get solidified. Once the printing process comes to a halt, the powder gets blown out, thereby leaving the output which is the reflection of the original model or drawing. Depending on complexity and size of output, this process takes around ½ an hour. These 3D printers do a commendable job, especially when pre-production examples or working prototypes of the specified objects are seen on the computer monitor.

Self-replicating 3D printers: The ’self-replicating rapid prototype’, better known as RepRap is believed to lessen the price of three-dimensional printers, thereby paving way for the future where spare parts and broken objects are just re-printed on a homely basis. There would also be a way out for creation of unique and novel objects.

At present, 3D printers of the above type cost around $25000. They are still to capture the domestic market. They are instead being used by the industry for developing parts for machines like aircraft engines, hearing aids, and spaceships.

Plummeting Prices: Adrian Bowyer has strongly believed the prices of self-replicating 3D printers to lower to around $500, as no cost other than that of raw materials would be involved. He has further stated that these machines would turn out to be more competent and build up new capabilities. Once the soft ware guiding the process of self-replication becomes available, it would be there at the free service of the customers. This has also been said by Adrian Bowyer.

Tepid Metal: Circuits are normally built by 3D printers by carrying out the fusion of powdered metal and laser. However, the self-replicating 3D printers are aimed at use of metallic alloy of cadmium, tin, lead, and bismuth that have a low-melting point and squirting them to have the circuits formed from a syringe that is thoroughly heated. It’s not compulsory for the machine to be capable to assemble itself. Just production of all those parts that are very necessary excluding the lubricating grease and microprocessors is required.

Go to Prototype Zone to get your free ebook on Prototyping at Prototyping. Prototype Zone also has Rapid Prototyping Forum, 3D Printer Blog and other information on Prototype Information and daily news. You can Find Prototype Zone at http://www.prototypezone.com/

Article Source: http://EzineArticles.com/?expert=Ryan_Rounds

Nonetheless, both these machines are used in fabricating scale models used in engineering, automation, manufacturing and mechanics. In recent years, however, the use of these machines has expanded beyond the confines of engineering to medicine, education, and even the arts. But what makes these machines different from each other?

What Are Rapid Prototype Machines?

The term “rapid prototype machine” actually refers to a wide range of machines that use many different technologies to create scale models. These technologies have names such as stereolithography, where photosensitive resin is shaped and hardened by a laser beam; solid ground curing, where the resin is cured with ultraviolet rays; or fused deposition modeling, where melted polymer is built in layers around a support structure.

Regardless of the technology used in these machines, the procedure used in creating models is almost uniform. A model is generated using CAD software, and the model is then converted into a file with an STL extension. The rapid prototype machine then processes this STL file by slicing it layer by layer. These layers are then produced on a platform using resin, and once completed the model is finished and cured.

3D Printers Are Rapid Prototype Machines

As for 3D printers, they are actually a subclass of rapid prototype machines. What makes them distinct from the other rapid prototype machines is that they are faster. The word “rapid” in rapid prototype machines can be misleading because creating models with them can still take days, even weeks. With 3D printers, you can have your model within a matter of hours, even minutes.

Most machines that are classified as 3D printers make use of inkjet printing technology, which is why they are called “printers” in the first place. This does not mean that 3D printers use inkjet technologies exclusively. There are such machines that also use derivatives of the fused deposition modeling process or the ultraviolet curing process. In 3D printers that use inkjet technology, the resin is sprayed on the printing platform using inkjet nozzles.

Another characteristic of 3D printers is that the base materials they use are usually non-toxic and do not require curing or finishing. This is a big contrast with 3D models created with stereolithography, for instance. In stereolithography, the resins that operators work with can become toxic if left uncured.

In addition, 3D printers are a lot less expensive. A starter 3D printing machine can cost US$15,000. While that figure cannot be considered cheap, it is relatively inexpensive compared to high-end rapid prototyping machines that can cost hundreds of thousands of dollars. There are also 3D printing machines that you can make on your own using starter kits and open source software.

This Article is written by John C Arkin from PrintCountry the contributor of PrintCountry Articles. More information on the subject is at PrintCountry, and related resources can be found at Printer Cartridges.

Article Source: http://EzineArticles.com/?expert=John_C_Arkinn

The old school method of creating prototypes involved first creating two-dimensional drawings of a part and then taking those drawings to a model maker to create the prototype. The model maker would first have to correctly interpret the drawings (assuming that all of the necessary information was shown), and then a process for creating the prototype was identified. This process could be as simple as cutting metal with a band saw to as complicated as creating an injection mold. After the part was created, the smart engineer would have the part carefully inspected and measured to make sure that it fell within the specifications on the drawings. If it didn’t pass inspection, the part would need to be modified or, worse yet, scrapped and the entire process would start all over again.

Whew! The memory of it all is enough to give me nightmares, but thankfully, technology has provided an alternative… and what a spectacular alternative it is. Imagine taking the same part that took days or weeks to create and having it in your hand in 45 minutes. Consider the following process using the “new school” method.

A part is created digitally inside of a computer using 3D modeling software. The file is then saved in a common format and sent to a 3D printer. The printer builds the part one thin section at a time from the bottom up putting water soluble supports in where necessary. It takes from 20 minutes to several hours to complete depending on the size and complexity of the part. The part is removed from the printer, placed in a detergent solution to dissolve the supports, rinsed, dried, and is back in the engineer’s hands the same day. The dimensional accuracy of the part is in fractions of a millimeter, so most parts do not require additional measurement and verification. Bing… bang… done!

It almost sounds too good to be true. The printers must be RIDICULOUSLY expensive, right? Wrong. These printers have become relatively affordable in recent years, and while there are still models costing upwards of $250,000, there are very functional 3D printers between $20,000 and $40,000. Weigh that against the old school method of creating prototypes, and it doesn’t take long for the material, time, and labor savings to make a 3D printer a money making move for many businesses.

3D printers are by far one of the most intriguing components of Digital Prototyping, and I love watching people stand transfixed as they watch the printer quietly build the part one layer at a time. The parts don’t exactly materialize before your eyes, but when the printer door opens, and a functional part comes out, the reactions of the spectators would make you think it had just come out of a Star Trek replicator. The technology is not quite that advanced, but it is definitely very, very cool.

Tek Lentine is an expert in the field of Digital Prototyping and other hi-tech business solutions. Tek currently works as an account manager for Hagerman & Co offering not only Digital Prototyping software and hardware but also training and consulting expertise in the areas that he writes about. You can contact Tek with questions or comments by email at TekLentine@Hagerman.com or on his cell phone at (574) 386-7279. Be sure to check out Hagerman & Co’s web site at http://www.hagerman.com/

Article Source: http://EzineArticles.com/?expert=Tek_Lentine

• The additive manufacturing technology helps the machine to read data from computer aided design and builds the model with the help of layers of liquid, powder and sheet material. Various cross sections are used while building up the model. The layers are combined with the virtual cross section automatically to get the final shape.

• The biggest advantage of the rapid prototype fabrication is that it is able to form or create any type of geometric feature or shape.

• The stereo lithography helps in the formation of the accurate shape of any object with the usage of triangular facets and aims at quality production.

• The models can be constructed within hours instead of days. The time depends on the complexity of the object to be created or the type of machine used. It definitely takes lesser time than the usual digital data or 3D.

• The technique of solid freeform fabrication uses two types of materials, the part material and the support material, which is later removed with a solvent, by water or by heat.

• There are 3D printers present in the rapid prototype machine that helps the manufacturers or the designers in the rapid development of the production.

• It helps the manufacturers by detecting the flaws and errors beforehand and thereby reduces the cost of re-work. It gives the right and clear concept of the idea and plan that is supposed to be implemented by the manufacturers.

• Rapid prototype helps in the construction of the prototype at a very low cost in a very short period of time. The prototype is almost similar to the actual product and it is created by the cross sections and forming layers in the free space until the model is prepared.

• It is beneficial for the implementation of new ideas and plans for the manufacturers and used in a short production cycle, where the time is very limited and the task is to be finished at a low capital investment.

Go to Rapid Prototype to get free information on this product. This website will give you all of the information you need on this topic along with a lot of other free information. Don’t miss out on this new website if you are looking for more information. Find us at http://rapidprototypezone.com/

Article Source: http://EzineArticles.com/?expert=Ivan_Irons

The high demand for rapid prototyping services can be attributed to a number of factors. These services help in eliminating design flaws at the conceptualization stage itself. There are a number of devices that assist in rapid prototyping; 3D Printers being one of them.

Numerous industry verticals require its services; especially those that are associated with design and development of products; the automotive sector being the most prominent of all.

In our opinion, having the support of a reliable vendor can be the source of a sustainable competitive advantage. If your vendor can ensure quick deliveries and provide innovative solutions to your problems then it will greatly reduce your time to market and help you churn newer versions of products with a faster turn around time.

Another advantage is in terms of the safety of intellectual property. Rapid manufacturing solutions tools like 3D printers ensure that your designs never leave the premises of your company and your intellectual property is safeguarded.

This industry is all set for exponential growth in the times to come. However, what is proving to be the biggest impediment to the growth of this industry is the high cost of prototyping machines. This problem is likely to be solved in the near future as demand for prototyping services increase, leading to higher supply and thereby lower MRP of the machines.

Rapid Prototyping is in high demand in medical, engineering, and industry. With computers acquiring digital capabilities; users can input two-dimensional drawings and obtain three-dimensional models of their ideas. The availability of precise image manipulation software’s has helped designers to simulate designs with a remarkable degree of accuracy through the use of vectors.

Mathematically computed imagery helps in developing designs with a very low error margin of less than 1 millimeter. An example would illustrate this better. Suppose a group of surgeons want to operate upon the cranium of a patient but have not decided upon the right surgical procedure to be used. Rapid prototyping proves very helpful in such circumstances. By using a prototype of the cranium developed through a three dimensional printer; surgeons can arrive at a strategy before operating on a patient.

Thus, we see that rapid prototyping has the potential to become the backbone of the medical, design and manufacturing industries and is certainly one of the gifts of the digital age to mankind.

At EMS we deliver our 3d scanning, reverse engineering, and rapid prototyping service involving both on-site and off-site engagement models.

Article Source: http://EzineArticles.com/?expert=Jon_T_Smith

New product development and innovation is much more difficult and time consuming than most other business activities. Automotive rapid prototyping greatly enhances learning speed and reduces the risk of new automotive parts development.

Historically, the automotive industry has been using rapid prototyping as an important tool in the automotive parts design process. The extremely fast-paced automotive design cycles require an extremely fast prototyping system which can produce car parts fast and inexpensively.

The main objective of automotive prototyping is to learn quickly: how a new automotive product behaves in its natural working environment, before transferring the prototype to the production line. Many times, mistakes are learned only after a new automotive part is launched. This is the main explanation for poor automotive parts design, from product mismatch, poor engineering and function or finish, and overpriced production. In order to accelerate the learning curve, before these costly automotive prototyping mistakes are made, one must accelerate and facilitate feedback loops from tests in the lab and market trials.

Automotive Manufacturing Technologies

Working with an assortment of rapid prototyping equipment, automotive prototyping engineers utilize the most advanced 3D printers, in their quest for perfect form, function and utility. Working in advanced manufacturing centers, the automotive engineers use the technology to verify what they are doing, and, equally important, to save tremendous amounts of time, and money.

Automotive Rapid Prototyping Compresses Development Time

The advantages of 3D rapid prototyping model creation versus viewing a cad/cam model on a computer screen is palpable. Automotive parts engineers get together discuss the pros and cons of a rapidly produced automotive parts model and discuss the pros and cons of the design, as they pass it around, twisting and viewing the prototype, and decide if that is what they had in mind. This way, problems get solved up front, before going to the assembly line! Once determined that the automotive prototype design is a go, the model can then be sent to a die maker.

Automotive Prototyping and the Die Maker Process

The die maker cannot use model to make the die, but because they have it in their hand and can look at it and feel it, they can determine where the parting lines will be and exactly how much steel they will need to produce it. The timing of the die process is greatly compressed.

Examples of Automotive Rapid Prototyping Parts

· Engine castings and parts

· Car Engine parts

· Auto Mechanical parts

· Car Dashboards

· Car Handles and Knobs

· Auto Body Components

· Car Trim parts

Fail first Paradox in Automotive Rapid Prototyping

The automotive rapid prototyping paradox is to fail earlier rather than later. By failing earlier, the design engineers surprisingly succeed in accelerating the project; this greatly reduces development cost risk. By considering all automotive prototype failures as learning experiments, the engineer has much less stress, knowing that they are practicing the old adage, that success comes from ninety-nine percent failure and introspection.

About The Author

For those involved in product development, engineering, and other form-giving applications, rapid prototyping (RP) technology can offer an excellent deliverable for various applications. Prototyping can be used for concept generation, ergonomic testing, test fitting, functional testing and even small-batch production.

There are various rapid prototyping technologies available for use including Fused Deposition Modeling (FDM), Stereolithography (STL), Selective Laser Sintering (SLS), and 3D Printing. Each of these technologies has advantages and disadvantages.

Fused Deposition Modeling technology is marketed commercially by Stratasys, which also holds a trademark on the term. Like most other RP processes FDM works on an “additive” principle by laying down material in layers. A plastic filament or metal wire is unwound from a coil and supplies material to an extrusion nozzle which can turn on and off the flow. The nozzle is heated to melt the material and can be moved in both horizontal and vertical directions by a numerically controlled mechanism, directly controlled by a computer-aided design software package. In a similar manner to stereolithography, the model is built up from layers as the material hardens immediately after extrusion from the nozzle.

Stereolithography is an additive fabrication process utilizing a vat of liquid UV-curable photopolymer “resin” and a UV laser to build parts a layer at a time. On each layer, the laser beam traces a part cross-section pattern on the surface of the liquid resin. Exposure to the UV laser light cures, or, solidifies the pattern traced on the resin and adheres it to the layer below.

Selective laser sintering is an additive rapid manufacturing technique that uses a high power laser to fuse small particles of plastic, metal, ceramic, or glass powders into a mass representing a desired 3D object. The laser selectively fuses powdered material by scanning cross-sections generated from a 3D digital description of the part on the surface of a powder bed. After each cross-section is scanned, the powder bed is lowered by one layer thickness, a new layer of material is applied on top, and the process is repeated until the part is completed.

3D printing is a unique form of prototype creation that is rooted in traditional rapid printing technology. A three dimensional object is created by layering and connecting successive cross sections of material. 3D printers are generally faster, more affordable and easier to use than other additive fabrication technologies. While prototyping dominates current uses, 3D printing offers tremendous potential for retail consumer uses, especially because the cost of production is less than other methods, and the part build time is minimal. In the latest incarnations, 3D color printing is also available. This means that a part can be printed to represent the colors of the finished product, to show label concepts or requirements, or to indicate the results of stress analysis or other failure mode effects (FME) analysis.

For the most part, all rapid prototype systems require a 3D computer model to start the process. In most cases a significant amount of file preparation must be undertaken to get a file to generate a correct rapid prototype model.

As part of the innovation process, some companies may employ one or several rapid prototyping technologies in-house. However, being a new “cutting-edge” technology, many firms can make use of service bureaus to provide their rapid prototyping as the need becomes evident. Most service bureaus have detailed websites to market and serve their customers.

A handful of service bureaus are fairly large companies with numerous employees and locations. Many provide related services and technologies, such as tooling, industrial design, molding and production. However, service bureaus are typically small companies, and while they may be small, many of them are vertically integrated and can provide services from concept models to finished functional parts.

Service bureaus tend to specialize in one or more areas such injection molding, casting, etc. Examine a company’s portfolio or case histories on their web pages, or discuss previous projects with the company to try to better understand areas of particular expertise. Sculptors have also used the technology to produce complex shapes for fine arts exhibitions.

In the near future, rapid prototype technology will become more widespread and pervade even to the home. For now though, for timely and expert delivery, the use of a service bureau is the best way for most innovative companies, individuals and organizations.

About The Author

Geoffrey Brennan

Rapid prototyping denotes that automatic generation of objects by use of solid free form fabrication. The inception of the concept in 1980s saw the production of various forms of models as well prototype parts. The rapid prototyping concept has spread across various domains and features in numerous applications. Rapid prototyping is also commonly used in the manufacturing domains where the concept is used for production quality parts in relatively low figures. In arts also, the concepts are used for instance by sculptors to generate complex design and shapes that are meant for fine art exhibitions.

Rapid Prototyping is based on virtual designs taken from computerized designs or computer Aided design (CAD) closely related to the animation modeling software. The concepts of rapid prototyping would then transform the virtual designs into thin horizontal cross sections, which then lead to the creation of cross sections in physical locations. These are created in succession until a point where the whole model is complete.

In rapid prototyping, additive fabrication facilitates the reading of data from a CAD drawing by the machine. The machine will then get into a layering process where either, powder, sheet or liquid material in layered in succession. This is how a model in actually generated from a series of cross section representations. The feasibility of the methodology is that the layers which are done in correspondence with the virtual cross section from the CAD model are brought together and blended automatically to generate the final shape. One remarkable aspects of additive technology is its dynamism, which can be used to generate any shape or geometric feature.

In rapid prototyping the term ‘rapid’ is used relatively. The reality is that the generation of the desired model with available methods and procedures can talk many hours or even stretch to a number of days in tandem with the method adopted as well as the size and the complexity of the desired model. The term ‘rapid’ is thus used in a relative sense considering that the additive technologies can in some instance be produced desired models in hours but again it will depend on the type of a machine being used, the size of model in focus as well as the number of models to be generated simultaneously in cases of multiple model production.

Convectional injection molding is known to be more cost effective especially in manufacturing polymer products in large volumes. On the other end additive technology is also known to be speedy and cost effective in the cases where there is a production of relatively small quantities of parts. The remarkable merit of rapid prototyping is that it has enabled designers as well theme or concept modeling teams to generate components or parts as well concepts representations by use of convenient and portable desktop size printers. Printing and design technologies abound in the market yet rapid prototyping cashes in on the merits of cost effectiveness and speedy print out put and premium quality, which give designers and concept developers the real sense, and representation of their design models.