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This technology was first developed at the Massachusetts Institute of Technology and patented in 1993. In 1996, the ExOne Company was granted an exclusive field-of-use patent for the technology, [2] while Z Corporation, which was later acquired by 3D Systems, [3] obtained a non-exclusive patent for use of the technology for metal casting purposes. [4]
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.
3D printing filament in different colours with models created using the filament. 3D printing filament is the thermoplastic feedstock for fused deposition modeling 3D printers . There are many types of filament available with different properties.
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.
The 620 format was introduced by Kodak in 1931 as an alternative to 120. It was discontinued in 1995. The 620 format is essentially the same film on a thinner and narrower all-metal spool. While 620 film is required on a number of old Kodak Brownie cameras, many of these cameras can accommodate the slightly larger 120 rolls/spools.
The racks are most commonly made of metal wires, but they can also be found as plastic, polystyrene, foam, fiberglass, and polypropylene. Test tube racks come in the form of a classic rack, an interlocking cube form, a stack-able form, test tube drying rack, slant rack, and 1-well rack.
Alternatively, a sheave can be integrated and installed within the housing frame. In this case, the system can be set up anywhere around the drum. Oceanographic installations that spool rope up to 46 layers have demonstrated that level winders give synchronized and controlled spooling in the harshest, most testing conditions.
ISO 3532 Information technology — 3D Printing and scanning — Medical image-based modelling ISO 3532-1 Part 1: General requirement [Under development] ISO 3532-2 Part 2: Segmentation [Under development] ISO 3533:2021 Sex toys — Design and safety requirements for products in direct contact with genitalia, the anus, or both
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