Thermal insulation workpiece based on fused deposition modeling and preparation method thereof

A technology for connecting parts and external parts, applied in the field of additive manufacturing, can solve the problems of low service temperature, poor heat resistance, and inability to meet high temperature environments.

Active Publication Date: 2021-02-09
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the choice of resin for light-curing 3D printing is single, most of which are acrylic, have poor heat resistance, and have a low service temperature, so they cannot meet the use in high-temperature environments.

Method used

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  • Thermal insulation workpiece based on fused deposition modeling and preparation method thereof
  • Thermal insulation workpiece based on fused deposition modeling and preparation method thereof
  • Thermal insulation workpiece based on fused deposition modeling and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0084] The preparation method of the present invention will be further described in detail in conjunction with specific examples below. It should be understood that the following examples are only for illustrating and explaining the present invention, and should not be construed as limiting the protection scope of the present invention. All technologies realized based on the above contents of the present invention are covered within the scope of protection intended by the present invention.

[0085] The experimental methods used in the following examples are conventional methods unless otherwise specified; the reagents and materials used in the following examples can be obtained from commercial sources unless otherwise specified.

[0086] In the description of the present invention, it should be noted that the terms "first", "second", "third", "fourth", "fifth" and so on are only used for descriptive purposes, not to indicate or imply relative importance.

[0087]The grade o...

Embodiment 1

[0109] PC and hollow glass microspheres were blended at a mass ratio of 25:1 for 5 minutes, kneaded and plasticized by a twin-screw extruder, and then prepared into filaments with a diameter of 1.75 mm by a single-screw extruder. The processing temperature range of twin-screw extruder and single-screw extruder is 270-300°C. According to ISO1133, under the test condition of 300°C and 1.2kg, the measured melt index is 28g / 10min.

[0110] With the above-mentioned filaments as the first component material, FDM 3D printing is carried out by using the two-component feeding nozzle designed by the present invention, and polyethylene wax is introduced as the second component material at the same time. The outer nozzle diameter of the nozzle is 0.6mm, and the inner nozzle diameter is 0.4mm. The temperature of the external heating container is controlled at 120°C, so that the dynamic viscosity of the polyethylene wax is about 30mPa*s. By applying external pressure, the mass ratio of th...

Embodiment 2

[0113] Others are the same as in Example 1, the only difference is that the mass ratio of the first component material and the second component material is controlled at 10:1 by applying external pressure.

[0114] The printing parameter settings are the same as those in Comparative Example 1. Prepare a disc with a diameter of 30 mm and a thickness of 3 mm for thermal conductivity testing. Prepare a disc with a diameter of 30 mm and a thickness of 3 mm for thermal conductivity testing.

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Abstract

The invention provides a thermal insulation workpiece based on fused deposition modeling and a preparation method thereof. Taking advantage of the designability of 3D printing, design optimization iscarried out from the following three aspects: material body-introduction of low thermal conductivity filler and microstructure into thermoplastic polymer-introduction of low melting point phase changematerial and printing process through design of a two-component spray head-introduction of sodium bicarbonate powder combined with post-treatment heating to improve the porosity of the workpiece. Thesynergistic effect of three aspects realizes excellent thermal insulation performance of the workpiece. Besides, a line deposited by adopting the spray head in the 3D printing process has a skin-corestructure, the change of micro-components of the deposited line can be realized by changing process parameters according to actual requirements, the regulation and control of microscopic performanceare realized, and further, the macroscopic anisotropy of the workpiece is realized.

Description

technical field [0001] The invention relates to a thermal insulation part based on fused deposition molding and a preparation method thereof, belonging to the technical field of additive manufacturing. Background technique [0002] The traditional molding method of thermal insulation products is to mix the thermal insulation material and resin material, pour it into a customized mold, and shape it after heating and pressing. The traditional molding method requires custom molds, the processing cycle is long and the processing quality of the mold directly affects the heat insulation performance of the molded parts. In addition, heat insulation parts are not easy to demould after molding, and their surface quality is easily damaged. [0003] With the maturity of electronic information technology, 3D printing also emerged and became popular on a large scale, opening the era of moldless manufacturing. "The Economist" magazine once described that digital manufacturing technology...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C64/118B29C64/209B33Y30/00B33Y10/00B33Y70/10
CPCB29C64/118B29C64/209B33Y30/00B33Y10/00B33Y70/00
Inventor 王剑磊王西柚吴立新
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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