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Reinforcing material applied in selective laser sintering

A reinforced material and laser sintering technology, applied in the field of 3D printing, can solve the problems of poor surface finish, poor precision, and few types of usable products, and achieve the effect of good surface finish and precision, and cost reduction

Inactive Publication Date: 2014-07-02
苏州大业三维打印技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, SLS technology still has the following defects and deficiencies: 1. There are few types of materials that can be used, and they are always only partially close to each other, which cannot meet the requirements of various physical properties such as yield strength, tensile strength, and elastic modulus in practical applications; 2. The surface finish is poor and the precision is poor. The fluidity is a dilemma for the precision control and the surface of the molded parts. If the fluidity is too high, the precision control will be difficult. The molded parts will easily cause bending deformation after firing, and the fluidity is too high If it is low, the surface of the molded part will show orange peel phenomenon; 3. The utilization rate of materials is low. The used materials will lose some physical properties due to heating, and some materials must be reused. The waste phenomenon is serious and the cost remains high.
It can be seen that the main reason for the existence of this technical defect is caused by the material.

Method used

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  • Reinforcing material applied in selective laser sintering

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Effect test

Embodiment 1

[0019] Provide a kind of reinforcement material used by selective laser sintering technology, the components of the reinforcement material are: by mass percentage, nylon PA12 65.6%, strength modification material 30%, nucleating agent 0.4%, fluidity modifier 2%, whitening agent or dyeing agent 1%, modified material 1%.

[0020] The particle size of the nylon PA12 is 25 μm, which is used as the base material of the reinforcing material.

[0021] The particle size of the strength modifying material is 25 μm, which can enhance various physical properties such as yield strength, tensile strength and impact strength of the material.

[0022] The nucleating agent can be a mixture of long carbon chain carboxylic acid calcium salts, and the nucleating agent plays the role of crystal nucleus in the crystallization process of the material, promotes the crystallization of the material, and improves the physical properties of the material.

[0023] The fluidity modifier can be one or mor...

Embodiment 2

[0032] Provide a kind of reinforcement material used by selective laser sintering technology, the composition of the reinforcement material is: by mass percentage, nylon PA12 70.8%, strength modification material 23%, long carbon chain carboxylic acid calcium salt mixture 0.2% , Nano aluminum oxide 4%, 4-methyl-7-dimethylaminocoumarin 1%, glass beads 1%. The particle size of the nylon PA12 is 35 μm, the particle size of the strength modification material is 40 μm, and the particle size of the nano-alumina is 25 μm.

Embodiment 3

[0034] Provide a kind of reinforcement material used by selective laser sintering technology, the composition of the reinforcement material is: by mass percentage, nylon PA12 67.7%, strength modification material 27%, long carbon chain carboxylic acid calcium salt mixture 0.3% , Nano zinc oxide 3%, 4-methyl-7-dimethylaminocoumarin 1%, spheroidized quartz sand 1%. The particle size of the nylon PA12 is 30 μm, the particle size of the strength modifying material is 60 μm, and the particle size of the nano zinc oxide is 20 μm.

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Abstract

The invention discloses a reinforcing material applied in selective laser sintering. The reinforcing material comprises nylon PA12, a strength modifier material, a nucleating agent, a flow modifier, a coloring or whitening agent and a modified material. Due to the adoption of the manner, the reinforcing material disclosed by the invention has more excellent physical properties of tensile strength, elastic modulus, flexural strength and modulus, notch impact strength and the like than traditional materials and good surface finish and accuracy. The reinforcing material has lowered proportion in the total mix, thereby effectively reducing costs.

Description

technical field [0001] The invention relates to the field of 3D printing, in particular to a reinforcing material used in selective laser sintering technology. Background technique [0002] 3D printing is a common name for additive manufacturing. It is a technology based on digital model files and using bondable materials such as powdered metal or plastic to construct objects by layer-by-layer printing. Its core is digitization and intelligence. Combining manufacturing and materials science. Contrary to the traditional subtractive manufacturing method of cutting raw materials, the process of 3D printing is like building a wall with bricks, adding materials layer by layer, and finally forming a product. [0003] 3D printing does not require molds, and can directly manufacture sample prototypes, thus greatly reducing the time from drawings to objects. Parts of any complex shape can be decomposed into a series of two-dimensionally fabricated superpositions. This concept of r...

Claims

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Application Information

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IPC IPC(8): C08L77/02C08K13/04C08K7/20C08K7/14C08K7/18C08K7/06C08K7/00C08K3/04C08K5/098C08K3/22C08K3/36
CPCC08K13/04C08K3/22C08K5/098C08K7/18C08K7/20C08K2003/2227C08K2003/2296C08K2201/003C08K2201/011
Inventor 陈烜彭鹏单贵玖吴展民
Owner 苏州大业三维打印技术有限公司