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Method for 3D printing of bicomponent composite material with skin-core structure

A skin-core structure and composite material technology, applied in 3D object support structures, additive processing, coating devices, etc., can solve the problems of easy separation and uneven distribution of materials, and achieve difficult separation, rich varieties, and product performance. excellent effect

Inactive Publication Date: 2019-01-15
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problem that the materials of different components are unevenly distributed and easily separated from each other when preparing two-component composite materials by 3D printing in the prior art, and to provide a method that can distribute materials of different components evenly and Method for 3D printing skin-core structure two-component composites to make them tightly bonded

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for 3D printing a skin-core structure two-component composite material. The 3D printer is mainly composed of a silo I, a silo II, a screw extruder I, a screw extruder II, a metering pump I, a metering pump II, a distribution plate, Composed of nozzles and multiple melt pipes, silo I and silo II are connected to screw extruder I and screw extruder II respectively, and screw extruder I and screw extruder II are respectively connected to metering pumps through melt pipes I is connected to the metering pump II, the metering pump I and the metering pump II are connected to the same distribution plate, and the distribution plate is connected to the nozzle, the specific steps are as follows:

[0024] (1) Polycaprolactone powder and nylon particles are melted in screw extruder I and screw extruder II respectively from silo I and silo II; Dry in a vacuum oven with a temperature of 60°C and a vacuum of 60% for 10 hours; nylon is dried in a vacuum oven with a temperature ...

Embodiment 2

[0028] A method for 3D printing a two-component composite material with a skin-core structure, the structure of the 3D printer is consistent with that of Example 1, and the specific steps are as follows:

[0029] (1) Block polylactic acid and ABS particles are melted in screw extruder I and screw extruder II respectively from silo I and silo II; wherein, polylactic acid is heated at a temperature of 110 ℃ and a vacuum of 70% in a vacuum drying oven for 8 hours; ABS was dried for 7 hours in a vacuum drying oven with a temperature of 130 °C and a vacuum of 95% before entering the silo II, and the screw extruder I The internal temperature is 180°C and the pressure is 25.0MPa. The internal temperature of the screw extruder II is 100°C and the pressure is 45MPa. The silo I and silo II are protected by nitrogen;

[0030] (2) transported by the melt pipeline to metering pump I and metering pump II;

[0031] (3) After being metered into the same distribution plate by the metering pum...

Embodiment 3

[0033] A method for 3D printing a two-component composite material with a skin-core structure, the structure of the 3D printer is consistent with that of Example 1, and the specific steps are as follows:

[0034] (1) Nylon 6 powder and polycarbonate particles are melted in the screw extruder I and the screw extruder II from the silo I and the silo II respectively; Dry in a vacuum oven at 150°C and a vacuum of 50% for 11 hours; polycarbonate is dried in a vacuum oven at a temperature of 110°C and a vacuum of 90% for 12 hours before entering the silo II. The temperature inside the extruder I is 250°C and the pressure is 40MPa, the temperature inside the screw extruder II is 220°C and the pressure is 15.0MPa, and the bin I and bin II are protected by nitrogen;

[0035] (2) transported by the melt pipeline to metering pump I and metering pump II;

[0036] (3) After being metered into the same distribution plate by the metering pump, the distribution plate is distributed to the ou...

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Abstract

The invention relates to a method for 3D printing of a bicomponent composite material with a skin-core structure. Skin layer polymers and core layer polymers are conveyed to an outer layer and a middle layer of the same nozzle of a 3D printer by different runners for extrusion to prepare the bicomponent composite material with the skin-core structure; the skin layer polymers and the core layer polymers are materials for forming a skin layer and a core layer of the bicomponent composite material with the skin-core structure; the 3D printer mainly consists of a bin I, a bin II, a screw extruderI, a screw extruder II, a metering pump I, a metering pump II, a distribution plate, a nozzle and multiple melt pipes; and the skin layer polymers and the core layer polymers are fed in the screw extruder I and the screw extruder II by the bin I and the bin II for melting, then, are conveyed into the metering pump I and the metering pump II by the melt pipes, are metered into the same distributionplate by the metering pumps, and are distributed into the nozzle by the distribution plate. Products printed by the method can integrate the characteristics of different materials to meet the demandsin different fields.

Description

technical field [0001] The invention belongs to the field of preparation of two-component 3D printing composite materials, and relates to a method for 3D printing two-component composite materials with a skin-core structure. Background technique [0002] 3D printing, also known as additive manufacturing, is a rapid manufacturing technology that forms three-dimensional entities by adding materials. Compared with traditional subtractive technology, 3D printing can manufacture geometric entities of any shape. At the same time, the 3D printing method also has the advantages of small material loss, shortened manufacturing cycle and low preparation cost, especially when manufacturing products with complex shapes, 3D printing has great advantages. [0003] Common 3D printing materials are mainly acrylonitrile-butadiene-styrene copolymer, polylactic acid, polyamide and polycarbonate. However, the products printed with these single-component materials often have relatively single p...

Claims

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Application Information

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IPC IPC(8): B29C64/209B29C64/20B29C64/112B33Y30/00B33Y10/00
CPCB29C64/112B29C64/20B29C64/209B33Y10/00B33Y30/00
Inventor 陈烨王华平刘顶李露瑶王朝生张玉梅李明明柯福佑
Owner DONGHUA UNIV
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