Stereolithographic curl reduction

Plastic and nonmetallic article shaping or treating: processes – Carbonizing to form article – Agglomeration or accretion

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

118423, 118429, 118620, 118712, 156 64, 1562735, 1562755, 156378, 1563796, 250432R, 2504921, 264 401, 264255, 264308, 365106, 365107, 425135, 4251744, 427 8, 4274301, 427508, 427553, B29C 3508, B29C 4102

Patent

active

052736911

ABSTRACT:
An improved stereolithography system for generating a three-dimensional object by creating a cross-sectional pattern of the object to formed at a selected surface of a fluid medium capable of altering its physical state in response to appropriate synergistic stimulation by impinging radiation, particle bombardment or chemical reaction, information defining the object being structurally specified to reduce curl, stress and distortion in the ultimately formed object, the successive adjacent laminae, representing corresponding successive adjacent cross-sections of the object, being automatically formed and integrated together to provide a step-wise laminar buildup of the desired object, whereby a three-dimensional object is formed and drawn from a substantially planar surface of the fluid medium during the forming process. A stereolithographic distortion known as curl is defined, and several techniques to eliminate or reduce curl are described, including dashed line, bent line, secondary structure, rivets, and multi-pass techniques. In addition, a quantitative measurement of curl known as the curl factor, and a test part known as a quarter cylinder are described, which together can be used to measure the effectiveness of the above techniques in reducing curl.

REFERENCES:
patent: 2775758 (1956-12-01), Munz
patent: 4139654 (1979-02-01), Reed
patent: 4575330 (1986-03-01), Hull
patent: 4752498 (1988-06-01), Fudim
patent: 4801477 (1989-01-01), Fudim
patent: 4945032 (1990-07-01), Murphy et al.
patent: 4961154 (1990-10-01), Pomerantz et al.
patent: 5015424 (1991-05-01), Smalley
patent: 5031120 (1991-07-01), Pomerantz et al.
patent: 5059359 (1991-10-01), Hull et al.
patent: 5137662 (1992-08-01), Hull et al.
Herbert, A. J., "Solid Object Generation", Journal of Applied Photographic Engineering, vol. 8, No. 4 (Aug. 1982), pp. 185-188.
Kodama, H., Rev. Sci. Instrum. 52(11), Nov. 1981, "Automatic Method for Fabricating A Three Dimensional Plastic Model With Photo-Hardening Polymer", pp. 1770-1773.
Fudim, E. V., "A New Method of Three-Dimensional Engineering", Mechanical Engineering, pp. 54-59, Sep. 1985.
Fudim, E. V., "Sculpting Parts With Light", Machine Design, pp. 102-106, Mar. 1986.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Stereolithographic curl reduction does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Stereolithographic curl reduction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stereolithographic curl reduction will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1540786

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.