In this blog post, we will look at the principles of 3D printing technology and examples of its use in various industries to explore the potential of this technology in the future.
3D printing is a technology that actually reproduces the shape of a three-dimensional object, and the printer that realizes 3D printing is called a 3D printer. 3D printing technology has developed rapidly in recent years, bringing innovative changes to manufacturing and various other fields. Initially limited to simple prototyping, 3D printing technology is now used in a wide range of industries, including advanced manufacturing, medicine, and art. For 3D printing, data representing the surface of an object in three-dimensional space is required. To obtain such data, a computer and 3D software for model creation are essential. Of course, if data of an actual object is obtained using a 3D scanner, it can also be used as data for 3D printing.
The data obtained using 3D software is generally represented as a polygon mesh. A polygon mesh represents a surface by connecting polygons, with triangles and squares mainly used as basic shapes. Data is created by representing the vertices of the polygons divided by the polygon mesh as spatial coordinates in the X, Y, and Z directions. The more vertices that need to be assigned coordinates, the greater the amount of data. Polygon mesh data must be converted into data that represents the object as a stack of thin layers. Using the coordinates of the polygon mesh, data for each layer is created in order from the bottom to the top.
After creating the data, it is sent to a 3D printer to produce the final product. Various types of 3D printing can be implemented depending on the material used and the method of production. Among them, there is a method of creating layers using a light-curing resin that hardens when exposed to light in a liquid state, and there are also 3D printers that melt materials with a laser as if sculpting them using solid materials. Currently, various types of 3D printers are being developed, each tailored to specific applications and materials.
For example, metal 3D printing is suitable for manufacturing aerospace and automotive parts, while plastic 3D printing is often used to produce consumer goods and medical devices. Among these, 3D printers that use light-curing resin use liquid in the same way as inkjet printers.
A liquid photosensitive resin is applied to a plate inside the printer in layers about one-tenth the thickness of a human hair to form a layer of the object. The liquid material sprayed from the printer head is cured immediately after spraying by ultraviolet lamps on both sides of the head. Another layer is built up by spraying the raw material onto the hardened layer. This process is extremely precise and requires a high degree of technical adjustment.
Recently, sculptors have also been using 3D printing to preview the shape of their works. In industry, products designed with software can be made to look almost identical to the finished product. In addition, using computer networks, samples can be sent in a very short time regardless of distance, allowing opinions on products to be exchanged. This technology is particularly helpful in saving time and money, greatly improving efficiency in the prototyping process. A major advantage is that 3D printing makes it easy to produce complex designs and shapes that are difficult to achieve with traditional manufacturing methods.
The use of 3D printing is expanding rapidly, and it can be used in a wide range of fields, from the manufacture of everyday items to automobiles, aerospace, art, and medicine. For example, 3D printing is actively used in the medical field to produce customized prostheses and implants. These customized medical devices are tailored to the individual physical structure of each patient, maximizing the effectiveness of treatment.
In the automotive industry, 3D printing contributes to improving fuel efficiency and performance by enabling the rapid production of lightweight parts. In addition, 3D printing technology has been introduced in education, allowing students to design and print their own models, thereby developing their creativity and problem-solving skills. In the future, 3D printing technology is expected to advance further, enabling people to produce simple parts and everyday items at home.
Such technological advances will greatly change the paradigm of manufacturing and create a new form of consumer culture where consumers can immediately produce and use the products they want. Furthermore, 3D printing can establish itself as a sustainable manufacturing technology. It can contribute to environmental protection by reducing the amount of waste and energy consumption generated in traditional manufacturing processes. The unlimited possibilities of 3D printing technology will bring revolutionary changes to industry and everyday life in the future.
As such, 3D printing is becoming an important technology that goes beyond simple manufacturing and deeply affects various industries and our lives. We look forward to seeing how 3D printing technology will develop in the future and what new opportunities it will offer us. With the advancement of technology, we will be able to change the world in more creative and efficient ways.
