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Method for rapid manufacturing plastic functional piece

A manufacturing method and technology for functional parts, which are applied in the field of rapid manufacturing of plastic functional parts, can solve the problems of high shrinkage rate, difficult temperature control and high sintering temperature of formed parts, and achieve the effects of low equipment requirements, low cost and good strength

Inactive Publication Date: 2006-10-25
武汉华科三维科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For crystalline polymer powder, in the selective laser beam irradiation area, all the particles are melted and deformed, the individual particles disappear, and the solid high polymer becomes a viscous fluid, filling the voids in the powder, so the voids in the solidified sintered body The density and strength of sintered parts are very small, and the requirements of general functional parts can be met without post-processing. However, because the gaps between powder particles are filled, it has the disadvantages of high shrinkage rate and poor precision of formed parts.
In addition, due to the high sintering temperature of crystalline polymers, the temperature is not easy to control, and the material is easy to age. Inert gas protection is required during the sintering process, which requires high equipment requirements.

Method used

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  • Method for rapid manufacturing plastic functional piece
  • Method for rapid manufacturing plastic functional piece

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0036] ABS powder with an average particle size of 200 mesh was used as the sintered material. The HRPS-III SLS molding system of Huazhong University of Science and Technology was adopted, and the parameter settings are listed in Table 2. The formulations of the dipping gums are listed in Table 1.

[0037] The specific implementation steps are:

[0038] (1) Use the HRPS-III type SLS forming system, set the sintering parameters according to Table 1, and process the plastic part blank.

[0039] (2) Rinse the shape blank with a soft brush or high-pressure air to remove excess powder to obtain a porous plastic part blank.

[0040] (3) Perform impregnation and impregnation glue treatment on the part blank.

[0041] 1) After the components A and B of the dipping glue are prepared according to Table 2, mix the components A and B according to the mass ratio of 3:1, and mix evenly with an electric stirrer.

[0042] 2) Carry out impregnation treatment on the part blank until the imp...

example 2

[0048] PC powder with an average particle size of 160 mesh was used as the sintered material. The HRPS-III SLS molding system of Huazhong University of Science and Technology is used, and the parameter settings are listed in Table 2. The formulations of the dipping gums are listed in Table 1.

[0049] The specific implementation steps are:

[0050] (1) Use the HRPS-III type SLS forming system, set the sintering parameters according to Table 2, and process the plastic part blank.

[0051] (2) Rinse the shape blank with a soft brush or high-pressure air to remove excess powder to obtain a porous plastic part blank.

[0052] (3) Perform impregnation and impregnation glue treatment on the part blank.

[0053] 1) After the components A and B of the dipping glue are prepared according to Table 1, mix the components A and B according to the mass ratio of 3:1, and mix evenly with an electric stirrer.

[0054] 2) Carry out impregnation treatment on the part blank until the impregna...

example 3

[0060] PS powder with an average particle size of 200 mesh was used as the sintered material. The HRPS-III SLS forming system of Huazhong University of Science and Technology is used, and the parameter settings are listed in Table 2. The formulations of the dipping gums are listed in Table 1.

[0061] The specific implementation steps are:

[0062] (1) Use the HRPS-III type SLS forming system, set the sintering parameters according to Table 2, and process the plastic part blank.

[0063] (2) Rinse the shape blank with a soft brush or high-pressure air to remove excess powder to obtain a porous plastic part blank.

[0064] (3) Perform impregnation and impregnation glue treatment on the part blank.

[0065] 1) After the components A and B of the dipping glue are prepared according to Table 1, mix the components A and B according to the mass ratio of 10:3, and mix evenly with an electric stirrer.

[0066] 2) Carry out impregnation treatment on the part blank until the impregn...

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Abstract

The invention discloses a process to produce the plastic function unit. It makes the amorphous thermoplastic material to the powder of 160-250 eyes mean grain size firstly. Then the powder material is made to the plastic blank by the method of SLS, next to dip the blank by the dipping glue which the A component includes the 60-85wt% epikote, the 10-25wt% epoxy liquefier and the 3-15wt% toughness modifier, the B component includes one or more epoxy firming agent, the viscosity is 100-300mPa.S and the temperature is 30-60DEG C, the time is 10h. Then to dry the parts in the room temperature, last to grind the surface of the plastic parts. So the invention can produce the plastic function units of complex structure.

Description

technical field [0001] The invention belongs to the field of advanced manufacturing, and in particular relates to a rapid manufacturing method of plastic functional parts. Background technique [0002] At present, the rapid manufacturing methods of plastic functional parts mainly include stereolithography rapid prototyping (Stereo Lithograghy ​​Apparatus, SLA) of photosensitive resin, fused deposition modeling (Fused Deposition Modeling, FDM) of filamentary thermoplastics and crystalline thermoplastic powder The selective laser sintering method (Selected Laser Sintering, SLS) and so on. Among them, the process of preparing plastic functional parts by SLA is to scan the liquid photosensitive resin layer by layer with a laser in the ultraviolet wavelength range to make it solidify, thereby superimposing plastic functional parts. This method has the characteristics of high precision, but because the ultraviolet laser and photosensitive resin are expensive, the cost of function...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C67/00B29K63/00
Inventor 史玉升黄树槐杨劲松闫春泽
Owner 武汉华科三维科技有限公司