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Powder material for selective laser sintering 3D printing precision casting of wax mold, and preparation method and application thereof

A 3D printing and laser sintering technology, applied in the field of 3D printing materials, can solve the problems of low-molecular polymer kinematic viscosity, high melting point, wax powder into powder and single nature, limitations and large raw material problems, and achieve broad market competition Less force, agglomeration and electrostatic adsorption, good dimensional stability

Inactive Publication Date: 2018-06-15
GUANGZHOU DEXIN WAX PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Wax powder is powdery and has a single nature, which cannot meet the requirements for the production of complex or fine parts wax models. Low molecular polymers have high kinematic viscosity and high melting point, which will increase the difficulty in the melting and dewaxing step of casting parts.
Patent CN104693579A discloses a method for preparing a composite modified wax powder for laser sintering 3D printing by adding stearic acid, white carbon black, carbon black, and chopped carbon fiber to the wax powder base material ratio of double particle size distribution. Although the wax powder prepared by this method improves the phenomenon of electrostatic adsorption and agglomeration, and the dimensional accuracy and strength of the wax mold produced can meet the requirements of investment casting wax patterns, but because of the high requirements for the particle size and particle size ratio of the wax powder, the limitations and raw material problems are relatively large. When the wax powder is changed, it will have a great impact on the wax printing effect
The wax powder is low-molecular-weight wax powder with a low melting point, and there is no requirement for the performance of the overall wax powder. It is difficult to meet the requirements for wax models with large wax groups and thin-walled structures, because the wax powder is selected. Increased raw material requirements
Patent CN1326828A discloses a low melting point powder for laser sintering rapid prototyping precision casting wax mold, which uses polyethylene as raw material to prepare wax powder, and then adds surfactant, mold release agent, light absorber, viscosity reducer, anti Static agents, reinforcing and toughening agents, fillers, etc., although the prepared powder materials have good sinterability, excellent molding, and good adaptability to precision casting, but the use of polyethylene as a raw material makes the overall wax itself have high kinematic viscosity and large shrinkage. , which has a great influence on castings as shells

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In terms of mass parts, put 70# microcrystalline wax, beeswax, and montan wax into the reaction kettle according to the amount of 55 parts, 5 parts, and 9 parts, heat and stir at 90°C until the wax is completely melted, and then heat and stir in batches for 3 times Add 4.5 parts of PE wax, 17 parts of C5 hydrogenated petroleum resin, 3 parts of APAO, 5 parts of EVA resin, 1 part of stearic acid, and 0.5 part of acrylate copolymer, stir and heat until all organic matter melts, and continue heating and stirring for 1 hour. Then transport the wax liquid to the granulation distributor, the temperature of the distributor is 100°C, the speed of the conveying cooling steel belt is 4.5m / min, the temperature of the cooling air is 15°C, the cooling water in the front section is room temperature, and the cooling water in the rear end is 8°C. The wax powder base material is obtained in the receiver. The above wax material is cooled to -80°C, then mechanically crushed, processed and...

Embodiment 2

[0040] In terms of mass parts, put 58# paraffin wax, beeswax, and montan wax into the reaction kettle according to the amount of 54 parts, 12 parts, and 11 parts, heat and stir at 100°C until the wax is completely melted, and then add it in batches 3 times while heating and stirring 5 parts of PE wax, 25 parts of C5 hydrogenated petroleum resin, 3.5 parts of APAO, 5.5 parts of EVA resin, 1 part of low molecular weight polypropylene, 5.5 parts of stearic acid, 0.5 part of acrylate copolymer, stir and heat until all organic matter melts, continue Heat and stir for 1h. Then transport the wax liquid to the granulation distributor, the temperature of the distributor is 100°C, the speed of the conveying cooling steel belt is 4.5m / min, the temperature of the cooling air is 15°C, the cooling water in the front section is room temperature, and the cooling water in the rear end is 8°C. The wax powder base material in the receiver.

[0041] The above wax material is cooled to -110°C, th...

Embodiment 3

[0045] In terms of mass parts, put 70# microcrystalline wax, 58# paraffin wax, and montan wax into the reaction kettle according to the amount of 30 parts, 30 parts, and 8.5 parts, heat and stir until the wax is completely melted, and then heat and stir in batches 3 times Add 4 parts of PE wax, 17 parts of C5 hydrogenated petroleum resin, 3.5 parts of APAO, 5.5 parts of EVA resin, 1 part of stearic acid, and 0.5 part of acrylate copolymer, stir and heat until all organic matter melts, and continue heating and stirring for 1 hour. Then transport the wax liquid to the granulation distributor, the temperature of the distributor is 100°C, the speed of the conveying cooling steel belt is 4.5m / min, the temperature of the cooling air is 15°C, the cooling water in the front section is room temperature, and the cooling water in the rear end is 8°C. The wax powder base material in the receiver. The above wax material is cooled to -110°C, then mechanically pulverized, processed and sieve...

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PUM

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Abstract

The invention belongs to the technical field of 3D printing material, and discloses a powder material for selective laser sintering 3D printing precision casting of a wax mold, and a preparation method and an application thereof. The material includes the following components by mass: 30-80 parts of petroleum wax, 0-10 parts of beeswax, 0-10 parts of lignite wax, 0-5 parts of PE wax, 0-20 parts ofadding resin, 3-10 parts of a toughening agent, 0.5-5 parts of stearic acid, and 0.2-5 parts of a leveling agent, or 20-70 parts of petroleum wax, 10-20 parts of beeswax, 10-20 parts of lignite wax,5-10 parts of PE wax, 20-30 parts of adding resin, 10-20 parts of a toughening agent, 5-10 parts of stearic acid, and 0.2-5 parts of a leveling agent; 0.1%-1% of a surfactant; 0.1%-1% of a demouldingagent; 0%-0.5% of an antistatic agent; 0%-0.5% of an ultraviolet absorber; 0%-1% of an antioxidant; and 0%-1% of an inorganic filler. The powder material has the advantages of moderate hardness, low melting point, low shrinkage rate and the like, and can be applied to 3D printing.

Description

technical field [0001] The invention belongs to the technical field of 3D printing materials, and in particular relates to a wax pattern powder material for selective laser sintering 3D printing precision casting and its preparation method and application. Background technique [0002] 3D printing technology uses computer three-dimensional digital design of the target model, and then "stacks the printed materials layer by layer" through 3D printing equipment, and finally turns the digital model into a real object. 3D printing technology is one of the core technologies for the transformation and upgrading of the manufacturing industry. Many companies have tried to adopt 3D printing technology in the field of precision casting, but printing materials have always been a problem that has plagued everyone. At present, 3D printing technologies such as selective laser melting, stereolithography, selective laser sintering, 3D printing and gluing are constantly integrating with the f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L91/06C08L23/06C08L57/02C08K13/04C08K5/09C08K5/42C08K5/098C08K7/18B33Y70/00
CPCB33Y70/00C08L91/06C08L2205/025C08L2205/035C08L23/06C08L57/02C08K13/04C08K5/09C08K5/42C08K5/098C08K7/18
Inventor 范智勇汤从海范德贤
Owner GUANGZHOU DEXIN WAX PROD
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