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Low-hardness material used for 3D printing and preparation method thereof

A 3D printing, low-hardness technology, applied in the direction of additive processing, etc., to achieve the effects of compression deformation resistance mechanical properties, excellent surface texture, and convenient operation

Inactive Publication Date: 2017-03-01
HEILONGJIANG XINDA ENTERPRISE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the consumables used in 3D printing are basically hard consumables, and many low-hardness materials are needed in industry and life, such as tire models, etc. Hard materials such as ABS and PLA cannot meet the requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation method that is applicable to the low hardness material of 3D printing, adopts the following steps:

[0027] (1) 28 parts (weight ratio, the same below) of polypropylene T30S, 30 parts of thermoplastic elastomer SEBS YH503, 40 parts of mineral oil, 2 parts of antioxidant

[0028] (2) Weigh each material according to the ratio in (1), and mix it in a high-speed kneader for 1-10 minutes to obtain a premix;

[0029] (3) Put the premix obtained in (2) into a twin-screw extruder for extrusion and drawing. The temperature of the twin-screw extruder is set as follows: 190-230°C, 190-230°C, 190-230°C, 190°C -230°C, 190-230°C, 190-230°C, 190-230°C, die head temperature 190-230°C, screw aspect ratio greater than 32, screw rotation speed 150-180r / min, feeding speed 10- 15r / min.

[0030] The obtained material has a Shore hardness (A) of 60, a tensile strength at break of 2 MPa, and an ultimate elongation of 300%, which has good 3D printing fluency and interlayer ad...

Embodiment 2

[0032] The preparation method of the modified polylactic acid composite material applicable to 3D printing adopts the following steps:

[0033] (1) 28 parts (weight ratio, the same below) of polypropylene, 35 parts of thermoplastic elastomer SEBS, 35 parts of mineral oil, 2 antioxidants

[0034] (2) Weigh each material according to the ratio in (1), and mix it in a high-speed kneader for 1-10 minutes to obtain a premix;

[0035] (3) Put the premix obtained in (2) into a twin-screw extruder for extrusion and drawing. The temperature of the twin-screw extruder is set as follows: 190-230°C, 190-230°C, 190-230°C, 190°C -230°C, 190-230°C, 190-230°C, 190-230°C, die head temperature 190-230°C, screw aspect ratio greater than 32, screw rotation speed 150-180r / min, feeding speed 10- 15r / min.

[0036] The obtained material has a Shore hardness (A) of 50, a tensile strength at break of 6.0 MPa, and an ultimate elongation of 300%. It has good 3D printing fluency and interlayer adhesion....

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PUM

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Abstract

The invention relates to a low-hardness material used for 3D printing and a preparation method thereof. The low-hardness material comprises the following raw materials by mass percentage: 20-40 parts of polypropylene, 30-40 parts of a thermoplastic elastomer SEBS, 30-40 parts of mineral oil, and 0-3 parts of an anti-oxidant. The above raw materials are mixed through a high speed kneader, and a mixture is subjected to extrusion and wire drawing by using a double screw extruder to obtain the product. compared with the prior art, the produced material has the characteristic of low hardness, improves weatherability and heat resistance of the material, and has excellent performance on printing fluency and material layer interlayer bonding.

Description

technical field [0001] The invention belongs to the field of polymer materials and is suitable for 3D printing materials, in particular to a low-hardness material suitable for 3D printing and a preparation method thereof. Background technique [0002] 3D printing technology, a type of rapid prototyping technology, is a technology based on digital model files, using bondable materials such as metal or plastic, to construct objects by slicing and printing layer by layer. It has been widely developed in the fields of mold design, industrial machinery parts manufacturing, automobiles, aviation, medicine and medicine. 3D printing technology mainly includes stereolithography, laser sintering, fusion lamination, etc. Among them, fusion lamination printing (FDM) is an extremely important one, and its application range is also extremely wide. [0003] The main principle of Fused Deposition Printing Technology (FDM) is to heat the thermoplastic material at a temperature slightly high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L53/02C08L23/12C08L91/06B29C47/92B29C67/24B33Y70/00B29C48/92
Inventor 李健成李文岩林航
Owner HEILONGJIANG XINDA ENTERPRISE GRP
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