How Does a 3D Printer Work? An In-Depth Guide
3D printing is a groundbreaking process where you can create objects, layer by layer, in the real world, from digital files. This technology allows for the construction of complex shapes and designs, and modular products to create bigger items, which would be almost impossible to do at home, with traditional manufacturing methods.
3D printing is allowing start-up businesses to produce prototype products, transforming industries such as automotive, medical or fashion, at easily achievable budgets.
Understanding how 3D printers work is no longer the realm of tech enthusiasts or engineers. It’s becoming more and more an at-home appliance for hobbyists and small businesses. With this blog, you’ll grasp the basics and find a way to unleash your creativity. 3D printing offers a world of possibilities, where you can solve real-world problems, create customized products, and so much more.
Understanding 3D printing is a skill worth investing your time and energy into. Let’s get exploring the world of 3D printing with Ink Station!
What is 3D Printing?
3D printing is a process of creating a three-dimensional object by adding material, layer by layer for a filament printer, or through curing material with a UV light in the resin printing process. Objects are produced from a digital design.
Computer-aided Design (CAD) software allows people to create complex objects directly from a computer to the printer, often in the same room or facility. Incredibly convenient.
The journey of 3D printing began in the 1980s’. The first patent related to this technology was filed by Dr Hideo Kodama of Japan in 1980, but it was Chuck Hull in the USA, in 1986, who first successfully patented a commercial 3D printing process called stereolithography (SLA), and the creator of the widely used STL file format for modern 3D printing.
Today, 3D printing is pushing the boundaries of many industries, such as medical technology, aerospace engineering, bio-engineering and more. It is opening doors for smaller businesses to compete on a level playing field with big manufacturers, and it’s helping at-home hobbyists and artists realize their creative dreams.
The Basics of How 3D Printers Work
Let’s begin by looking at the core ideas of what 3D printing is, and the different types of 3D printing.
Types of 3D printing technologies
- Fused Deposition Modeling (FDM) – This is an additive manufacturing process, where an object is built layer by layer through selectively depositing melted material on the build platform in a predetermined path. It is the most widely used 3D printing type around the world and is the most common filament printing style.
- Stereolithography (SLA) – this is the most common form of resin printing. It is growing in popularity for its ability to produce fine quality prints with a high level of accuracy and a smoother surface finish. A light source, either a laser or a projector, is used to cure a liquid resin into a hardened plastic. Resin printers can be toxic, so safety standards must be followed both during and post-print.
- Selective Laser Sintering (SLS)– this is a 3D printing process where a high-powered laser is used to sinter (bind) a specific fine powder into a solid structure. A printer will lay down a layer of fine powder, and the laser is used to precisely bind that powder to the specifics of the digital file.
3D modelling software is a key ingredient in the 3D printing process. It is where a 3D object is created, which is then printed and realised.
Computer-aided Design (CAD) programs allow users to create highly detailed 3D objects. These are saved as STL files, instructions for the 3D printers to produce the object.
The #D software is the bridge between the ideas of a creator and the fully realized final product.
Key Components of a 3D Printer
What is a 3D printer, and what are the key components involved?
- The 3D printer frame and structure – A sturdy frame and physical foundation of a 3D printer, the frame provides stability for the printing components. Made from metal or very rigid plastic, it helps minimize vibrations during printing, allowing for precision. The frame houses the print bed, the extruders and nozzles, and the movement mechanics, allowing for movement and printing in all 3 axes.
- The printing bed: features and importance – The printing bed is where a 3D object is produced, where layers of filament, or treated resin, are laid down to create an object. A print bed needs to be adhesive to hold the object during printing, but not so grippy that you cannot remove the finished item easily. They also have to be level. A stable and level print bed is vital in producing a high-quality and accurate print.
- Extruders and nozzles: their roles in printing – Extruders and nozzles are what deliver the materials to the print bed, which get turned into the final 3D printer product. The extruder heats the filament and pushes it through the nozzle to be layered up for printing. The finer the nozzle, the finer the printed product, but the slower the print.
Filament types and their uses
There are 3 main types of filaments used in 3D printers.
- PLA (Polylactic Acid) – PLA is made from renewable sources such as corn starch or sugar cane. These filaments are produced in the same ways as other types of filaments, so the quality of print doesn’t suffer. PLA can be used to print medical supplies and foodstuffs. It works at lower temperatures, so there is no need for a heated print bed, and it has no foul odors associated with its use. PLA is biodegradable, breaking down between 18 months and 2 years. This is why it is perfect for medical applications, disposable clothing, disposable eating utensils and more.
- ABS (Acrylonitrile Butadiene Styrene) – a robust thermoplastic polymer, it is widely used in 3D printing and has properties such as high strength and durability and high heat resistance. Due to its durability, ABS 3D printing is often used to create mechanical components and prototypes, however, it needs a heated printer bed to prevent warping.
- PETG (Polyethylene Terephthalate Glycol) – This is a polyester variant that blends the ease of PLA and the strength of ABS. It is impact-resistant upon printing and is very resistant to moisture. It is used to create everyday products as well as some 3D-printed jewelry.
The 3D Printing Process Explained
How does a 3D printer work? There are 4 key steps in the 3D printing process.
- Preparing the design – This is where the idea first emerges, the concept of what you want to print. You design the model in a 3D modelling software package. The better the 3D model, the better the end product, so a good amount of time is required to ensure the model is functional and printable.
- Slicing the model – When your model is ready, you upload the 3D model into slicing software. This converts the model into thin slices, or layers, for the printer to produce. The software and the printer sync, so the software can take into account layer height, printing speed, temperatures and more.
- Printing the model – When the sliced model is uploaded (The G Code), the printer begins its process of layering the filaments or hitting resin with UV light. It produces the item onto the print bed and can take some time to fully produce a 3D-printed object.
- Post-printing – There may be some post-printing processing before you can take the model out to show the world. It can be washing the item, or treating it with UV light, sanding rough surfaces or sealing any holes or gaps in the model.
Applications of 3D Printing
How and where you can use 3D printing is already incredible, and the potential is only growing larger and further.
- Industrial manufacturing – You can create cost-effective replacement 3D printed parts, or custom-built parts for a wide range of industrial uses. It reduces the time between ordering and receiving and can cut down on industrial waste.
- Prototyping and design – innovators and inventors have now got an avenue to produce prototypes and examples of their fantastic ideas, right in their homes. It drastically reduces the costs of production to bring to market.
- Medical and dental applications – the ability to custom produce dental applications or custom-fit prosthetics and implants is a booming application for 3D printing.
- Consumer products and customization – at home hobbyists printing miniatures to paint, or jewelry to wear and sell; even printing stylish home furniture is a growing avenue for 3D printer owners.
Advantages and Challenges of 3D Printing
PROS
- Flexible design. What you can produce with a 3D printer is more or less only limited to your imagination and your ability to use the 3D modelling software.
- Rapid prototyping. You can produce parts or early test items quickly and you can alter the design as needed just as rapidly.
- Print on Demand. You don’t need to produce a lot of stock and have it sitting on a shelf. If you want something, you can just print it.
- Cost-effective. A single-step manufacturing process saves time and money.
- Ease of Access. 3D printers are accessible for people at home or are easy to find online to have your stuff printed.
- Environmentally friendly. – Reduces material waste, and post-production can improve fuel efficiency with lighter printed parts.
CONS
- Limited Materials. The range of materials you can use to print is limited.
- Restricted Build Size. What you can produce is limited to the print chamber and print plate. For bigger projects, you will have to print parts and then assemble them.
- Large Volumes. The cost per unit does not reduce by much if you scale up production.
- Copyright infringement. There are higher chances you may purchase fraudulently produced products.
- Loss of Jobs. Such automation may lead to a loss of jobs in the manufacturing sector.
The Future of 3D Printing
The future of 3D printing is bright and growing.
Printing material evolution is amazing.
- Bioprinting, using organic material to print skin, human tissue and organs, is revolutionizing medical organ transplants and saving many lives.
- The construction industry is using composite materials and metal to build cheap homes, reducing costs and their environmental impact.
- In-house expertise. Companies are using 3D printers in-house with their own experts, rather than outsource the need.
- Much like the Jeep was shipped to army units in a box and assembled in the field, the potential to 3D print components and build your own vehicle is enticing.
- Improved technology bringing faster printers to the home can have any number of real-world applications. Printing food, tools, or another household minutia.
Unlocking the Future: The Transformative Power of 3D Printing Technology
3D printers have revolutionized production, bringing the ability to imagine, create and produce almost anything to small businesses, large businesses and homes.
It is good for the environment through less material wastage, and good for the hip pocket with lower production costs.
The impact of 3D printing is only going to grow as technology improves and the materials you’re able to print with grows. The medical and pharmaceutical industry, construction, entrepreneurs and more, are all going to benefit from 3D printing technology in the future.
Ink Station can help you buy a 3D printer for your home. We have the printers, the filaments or the resin, everything you need to start 3D printing yourself.
FAQs About 3D Printing
What materials can be used in a 3D printer?
3D printers can use a variety of materials, including plastics like PLA, ABS, and PETG, metals such as stainless steel and titanium, resins for detailed models, and even more exotic materials like wood and metal filaments, ceramics, and conductive inks.
How long does it take to print an object?
The printing time for a 3D object varies widely, depending on its size, complexity, and the printer’s speed, ranging from hours for small items to days for larger designs.
Can anyone use a 3D printer?
Technically yes, but knowledge of 3D software, and an understanding of the printer itself, is needed. Both of these things are easy to learn and master.