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Quick forming method by adoption of projection technique

A projection technology, a fast technology, applied in the field of manufacturing, can solve the problems of low automation, poor molding precision, high cost of use, etc., and achieve the effect of large selection range, easy control and adjustment, and convenient control

Inactive Publication Date: 2008-06-04
谭昊涯 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the resin in the sheet shrinks and concentrates during curing, resulting in poor molding accuracy. The more prominent problem is that this method needs to make a light leakage plate for each layer of the molded part in advance, so the procedure is complicated and the use cost is high. In addition, The degree of automation is low, so this method has not been promoted

Method used

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  • Quick forming method by adoption of projection technique
  • Quick forming method by adoption of projection technique
  • Quick forming method by adoption of projection technique

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] The structure of the rapid prototyping machine is as figure 2 As shown, 50kg DuPont SOMOS 6100 photosensitive curing resin is loaded into the liquid tank 6, and the TGC-1 control software is loaded into the computer 3 (the flow of the TGC-1 control software is as follows: Figure 4 Shown), the digital three-dimensional model 2 of the object can be displayed on the computer display; the projector 1 connected to the computer is located above the tray 8. The photosensitive resin on the tray is provided by the liquid tank 6 to maintain the photosensitive resin liquid on the tray 6. The distance between the surface 10 and the projector is constant, so that the size of the projected graphic 9 on the liquid surface of the photosensitive resin remains the same. The lifting of the tray 8 is adjusted by the elevator 4; a horizontally reciprocating scraper 5 is installed on the liquid tank 6 to ensure The stability of the liquid surface position of the thin layer of photosensitive res...

Embodiment 2

[0082] The structure of the rapid prototyping machine and the rapid prototyping method are as in Example 1.

[0083] Projector parameters: three LCD transmission methods, resolution 800×600, light source 500W, iodine tungsten lamp, wavelength 40nm ~ 800nm.

[0084] Control parameters: Irradiation area: 150mm×150mm

[0085] Forming shape: cube

[0086] Forming size: 100mm×100mm×100mm

[0087] Support size: 100mm×100mm×10mm

[0088] The thickness of each layer in the forming process of the molded object: 0.1mm

[0089] Irradiation times: Support 50 times

[0090] The total number of irradiation times of the forming entity: 10000 times

[0091] Each irradiation time: 1.0 second

[0092] Test result: Forming time: 270 minutes (including the leveling action of layer preparation and the time required to switch the irradiation pattern)

[0093] Physical size: 99.66mm×9.66mm×99.85mm

[0094] Forming accuracy: X axis: 0.34%

[0095] Y axis: 0.34%

[0096] Z axis: 0.15%

[0097] Note: The s...

Embodiment 3

[0099] The structure of the rapid prototyping machine and the rapid prototyping method are as in Example 1.

[0100] Projector parameters: three LCD reflection methods, resolution 1024×768, light source 50W, UHP lamp, wavelength 40nm ~ 800nm.

[0101] Control parameters: Irradiation area: 120mm×120mm

[0102] Forming shape: cube

[0103] Forming size: 100mm×100mm×100mm

[0104] Support size: 100mm×100mm×10mm

[0105] The thickness of each layer in the forming process of the molded object: 0.1mm

[0106] Irradiation times: Support 50 times

[0107] The total number of irradiation times of the forming entity: 10000 times

[0108] Each irradiation time: 1.0 second

[0109] Test result: Forming time: 386 minutes (including the time required for the leveling action of the layer preparation and the switching of the irradiation pattern)

[0110] Physical size: 99.66mm×9.66mm×99.85mm

[0111] Forming accuracy: X axis: 0.21%

[0112] Y axis: 0.21%

[0113] Z axis: 0.13%.

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Abstract

The invention belongs to the producing area, which uses modern shadow casting technique and computer image processing technique to process the illumination solidification modeling on the surface of liquid photosensitive resin to form the three-dimensional solid quickly. The invention processes the sectional mould data of three-dimensional solid via the computer fast shaping processing technique to generate the digital grid image data which can be directly used in projection, to be transformed into digital optical signal via the digital image projector, and adjusted by different time and space patterns to be irradiated over the surface of photosensitive resin to solidify it.

Description

Technical field [0001] The invention belongs to the field of manufacturing, and particularly relates to a method for rapidly forming a three-dimensional entity by using modern projection technology and computer graphics processing technology to perform light curing and molding on the surface of a liquid photosensitive resin. Background technique [0002] Rapid Prototyping (RP) is a rapid and intelligent new forming method since the birth of computer control technology, which has set off a revolution in the manufacturing industry. Around the use of computer control technology has produced a series of rapid prototyping methods. For example, the technical solutions disclosed in US4575330, the SLS (Selective Laser Sintering) method developed by DTM in the United States, the FDM (Fused Deposition Mfg) method invented by Scott Crump engineers in the United States, and the LOM (Laminated Object Mfg) method developed by companies such as Gropp in the United States, Japan The SL (Stereoli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C67/00G06F17/50
Inventor 谭昊涯曹瑞军谭东风童家仙
Owner 谭昊涯
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