Download 10.12 신속조형기술, 신속금형기술 Processing of RP Parts

10.12 신속조형기술, 신속금형기술
Processing of RP
Parts
FIGURE 10.46
The computational
steps involved in producing a
stereolithography file. (a) Threedimensional description of the part. (b)
The part is divided into slices. (Only 1
in 10 is shown.) (c) Support material is
planned. (d) A set of tool directions is
determined for manufacturing each
slice. Shown is the extruder path at
section A-A from (c), for a fuseddeposition modeling operation.
Rapid Prototyping Processes
TABLE 10.7 Characteristics of rapid-prototyping processes.
RP Materials
TABLE 10.8 Mechanical properties
selected materials for rapid prototyping.
of
Stereolithography and FDM
(fused deposition modeling, 융해용착모델링)
FIGURE 10.47 Schematic illustration of the
stereolithography
process.
Source:
Courtesy of 3D Systems.
FIGURE 10.48
(a) Schematic
illustration of the fused-deposition
modeling process. (b) The FDM
Vantage X rapid prototyping machine.
Source: Courtesy of Stratasys, Inc.
Support Structures
FIGURE 10.49 (a) A part with a protruding section that requires support material. (b) Common
support structures used in rapid-prototyping machines. Source: After P.F. Jacobs.
Selective Laser Sintering
FIGURE 10.50 Schematic illustration of the selective-laser-sintering process. Source: After C. Deckard and
P.F. McClure.
Three-Dimensional Printing
FIGURE 10.51 Schematic illustration of the threedimensional-printing process. Source: After E. Sachs
and M. Cima.
FIGURE 10.52 (a) Examples of parts produced
through three-dimensional printing. Full color
parts also are possible, and the colors can be
blended throughout the volume. Source:
Courtesy ZCorp, Inc.
3D Printing of Metal Parts
FIGURE 10.53 The three-dimensional printing process: (a) part build; (b) sintering, and (c)
infiltration steps to produce metal parts. Source: Courtesy of the ProMetal Division of Ex One
Corporation.
Rapid Manufacturing: Investment Casting
FIGURE 10.54 Manufacturing steps for investment casting that uses rapid-prototyped wax
parts as patterns. This approach uses a flask for the investment, but a shell method can also
be used. Source: 3D Systems, Inc.
Sprayed Metal Tooling Process
FIGURE 10.55 Production of tooling for injection molding by the sprayed-metal tooling process. (a) A pattern and base
plate are prepared through a rapid-prototyping operation; (b) a zinc-aluminum alloy is sprayed onto the pattern (See
Section 4.5.1); (c) the coated base plate and pattern assembly is placed in a flask and back-filled with aluminumimpregnated epoxy; (d) after curing, the base plate is removed from the finished mold; and (e) a second mold half
suitable for injection molding is prepared.
Example: RP Injection Manifold
FIGURE 10.56 Rapid prototyped model of an injection-manifold design,
produced through stereolithography. Source: 3D Systems.
Case Study: Invisalign Orthodontic
Aligners
FIGURE 10.58 (a) An aligner for orthodontic use,
manufactured using a combination of rapid tooling
and thermoforming; (b) comparison of conventional
orthodontic braces to the use of transparent aligners.
Source: Courtesy Align Technologies, Inc.
FIGURE 10.59
Manufacturing sequence for Invisalign
orthodontic aligners. (a) Creation of a polymer impression of
the patient's teeth; (b) computer modeling to produce CAD
representations of desired tooth profiles; (c) production of
incremental models of desired tooth movement. An aligner is
produced by thermoforming a transparent plastic sheet
against this model. Source: Courtesy Align Technologies, Inc.