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The height of the print head is the height of the nozzle relative to the printing platform. This parameter affects the surface quality between layers including bond strength, and must be precisely adjusted.
3D printing, or additive manufacturing, is the construction of a three-dimensional object from a CAD model or a digital 3D model. [1] [2] [3] It can be done in a variety of processes in which material is deposited, joined or solidified under computer control, [4] with the material being added together (such as plastics, liquids or powder grains being fused), typically layer by layer.
While printing, support structures act as a part of design hence, their limitations and advantages are kept in mind while designing. Major considerations include: Support shallow angle geometry: Shallow angles may result in improper resin (structural strength issues) curing unless supports are provided uniformly. Generally, beyond a certain ...
Computer-aided design (CAD) model used for 3D printing. The manual modeling process of preparing geometric data for 3D computer graphics is similar to plastic arts such as sculpting. 3D scanning is a process of collecting digital data on the shape and appearance of a real object, creating a digital model based on it.
Stereolithography (SLA or SL; also known as vat photopolymerisation, [1] optical fabrication, photo-solidification, or resin printing) is a form of 3D printing technology used for creating models, prototypes, patterns, and production parts in a layer by layer fashion using photochemical processes by which light causes chemical monomers and ...
An example of how 3D printing can be included in the design process is automotive design. [19] There, it is necessary to quickly test and verify a prototype to get the design approved for production. The reduced post-processing steps induced by the multi-material 3D printing technology result in a shorter fabrication time.
In 3D printing, the bulk of each printed layer, regardless of complexity, is deposited by the same, rapid spreading process. [ 9 ] As with other powder-bed technologies, support structures are generally not required because loose powder supports overhanging features and stacked or suspended objects.
As the material is generated layer by layer the tray is gradually lifted and the photo inhibitors will not allow adhesion near the window. [13] Rapid, large-volume, thermally controlled 3D printing, using a mobile liquid interface. Another way to address the adhesion problem is to create a dead layer which prohibits the curing process.