What is Additive Process

增材制造工艺又称添加式制造，是指使用三维打印机根据三维模型创建实体对象。该工艺需要逐层添加材料或长丝，然后使用熔融应用（如加热打印头或激光）将各层粘合在一起。最终得到的三维打印物体是原始三维模型的精确复制品。

Additive manufacturing, also known as 3D printing, is a process of creating objects by joining materials based on 3D model data. This process involves adding layers of material on top of each other, as opposed to removing material in subtractive manufacturing methods. This definition is provided by the ASTM society.

To complete the additive manufacturing process, there are several steps that need to be followed. These include build removal, which involves getting rid of any extra material from the object and build platform. The next step is part separation, which involves taking the object off the build platform, separating the parts, and eliminating any support structures that were used during the build process. Finally, the objects need to be debound by soaking them in a solution to remove any excess binding material.

The additive method refers to a technique used to analyze reaction-time data and ascertain whether two variables impact the same or different processing stages. When two variables affect different stages, their effects are considered additive. Conversely, when two variables impact the same stage, their effects are interactive.

Fused Deposition Modeling (FDM)

FDM is considered the best additive manufacturing process due to its wide usage and ability to extrude material layer by layer to create products and prototypes. Additionally, FDM supports the use of real engineered plastics, making it a popular choice among manufacturers.

The protocol primarily used for additive manufacturing is known as the Additive Manufacturing File Format (AMF).

Directed Energy Deposition (DED)

Among the various additive manufacturing processes, DED is considered the fastest method for producing metal parts. Additionally, the melting and cooling process involved in DED results in the creation of dense and functional end products.

The four additive techniques used in laser-based bioapplications are categorized based on their patterning mechanism. These techniques include laser sintering, laser writing, laser transferring, and stereolithography methods.

The opposite of the additive process is known as subtractive manufacturing. This process involves the removal of sections of a material through cutting or machining, instead of adding layers.

Additive layer refers to the process of creating products by adding layers on top of each other based on a digital model. This method is distinct from conventional manufacturing techniques that involve removing material, like metal parts machining. ABS, PLA, PVA, and polycarbonate are the primary plastic materials utilized in additive manufacturing.

The reason behind calling 3D printing additive is that it involves the gradual addition of material layers to produce a 3D object. In contrast, subtractive manufacturing techniques involve carving out a final product from a larger material block. The additive approach of 3D printing results in minimal material wastage, making it an eco-friendly option.