3D printing, or additive manufacturing, is the construction of a three-dimensional object from a CAD model or a digital 3D model.[1] The term "3D printing" can refer to a variety of processes in which material is deposited, joined or solidified under computer control to create a three-dimensional object,[2] with material being added together (such as plastics, liquids or powder grains being fused together), typically layer by layer.

1. 3 D Printer
By Charles Holl 1986

2. Invention
• The technology for printing physical 3-D objects from digital data was first
developed Charles Holl in 1984.He named the technic as stereo lithography
and obtain a patent for the technic in 1986.
• While stereo lithography systems had become popular by the end of 1980s,
other similar technologies such as fuse deposition Modelling (FDM) and
selective Laser sintering (SLS) were introduced.

3. What is Mean by 3D Printing ?
• It is process of Printing a 3D solid Object From a Digital Model.
• Additive Manufacturing rather thanTraditional Subtractive Manufacturingd.

4. WhyWe use 3D Printers ?
3D Printing can produce different objects without creating specific tooling or
even using several tools.This is how 3D Printing helps increasing flexibility in
the production flow and helps reducing industrial expenses. There are a lot of
other good reasons to choose 3D Printing instead of other manufacturing
methods.

5. Use of 3D Printers
• Rapid Prototyping. Rapid prototyping with 3D printing takes the guesswork
out of new product design.
• Production Parts. Build durable, low-volume production parts with an array
of engineering-grade thermoplastics.
• ManufacturingTooling.

6. 3D 4D
• 4D printing has nothing to do with a fourth dimension. The big
difference b/w 3D and 4D is that a 4D printer produces products
which are able to adjust themselves according to their
surroundings.

7. • So the Difference is after the product is printed. For example, when a
Product is printed and when it comes in contact with the for example water,
it reshapes itself. The products will be able to reshapes themselves in a
prerecorded shape.
• The 4D printers creates a strand of multiple materials and that strand
becomes whatever we want it to.

9. Advantages
• Rapid prototyping: 3-D printing gives designers the ability to quickly turn
concepts into 3-D models or prototypes.
• Clean Process: wastage of materials is negligible complex shape can be
produce.
• Easy to use : No skilled person needed.
• Reduce design complexity.
• Fast creation.

10. Disadvantages
• 3-D printers are expensive to buy.
• Slow at building the shape.
• Final product is not very fine and needs some retouching before it can be
used which adds few more steps and devices in completing the job.
• Technology is still growing .

11. Update in 3D Printers
• From sense to print is a system that can automatically generate ready-to-print 3-D
CAD models
• It uses low-cost kinect sensor the printers currently generated our full models
• Works are progressing on an automatic approach to generated the 3-D shells
• They create replicas in one expensive materials such as copper or other metals.

12. Conclusion
• In this project, we explain carpet and yarn printing technology
• Yarn printing methods and types Carpet printing methodes, machines and
chemical agents
• We support our presentation with multimedia and schematic figures and
photos.
• Nowadays, carpet printing does not widely use in our country because of
inadequate printing suppliers in textile industries

13. Presented By