Functional fiber-grade 3D printing method based on reactive extrusion

A 3D printing and reactive extrusion technology, applied in the field of 3D printing, can solve the problems of inability to quickly control the properties of materials, uniform distribution of difficult functional components, unstable product quality, etc., to achieve fast accumulation, reduce mechanical properties, and molding speed Improved effect

Inactive Publication Date: 2016-09-07
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] From the perspective of existing technology, functional composite materials and products for 3D printing have been reported, but there are still some problems, mainly in the following aspects: Among the polymer raw materials, mainly pre-polymerized materials cannot be quickly regulated The bulk properties of the material; during the 3D printing process, the polymer needs to be remelted, and because the melting tube of the conventional 3D printing is short, in order to ensure the melting of the polymer, the heating temperature needs to be raised to 20-50°C above the melting point of the polymer , this secondary processing process affects the performance of the polymer itself, and it is easy to produce low molecular weight, and bubbles are prone to appear during the printing process, which af

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] Example 1

[0036] A functional fiber-grade 3D printing method based on reactive extrusion, combining the lactam monomer valerolactam and lactone monomer valerolactone with an additive of 0.1wt% acetyl caprolactam and an additive amount of 10wt % Plasticizer dibutyl phthalate; after melting, the polymerization reaction is carried out at a temperature of 150°C under the action of the addition of 0.01wt% of sodium hydroxide as the catalyst, and 0.01wt% of functional additives are added before polymerization Antioxidant 1010 to obtain the target polymer with a number average molecular weight of 1000. The polymerization reaction is completed in a screw extruder. The screw extruder includes a screw, an extrusion motor connected to the screw, a heating ring, a temperature sensor and a metering pump; the screw is Single screw, L / D ratio of 12, equal pitch, helix angle of 14°, groove depth of 1.5mm, surface roughness of Ra0.4; the extrusion motor connected to the screw is fixedly ...

Example Embodiment

[0040] Example 2

[0041] A functional fiber-grade 3D printing method based on reactive extrusion, which combines the lactam monomer caprolactam and the lactone monomer caprolactone with an additive isocyanate of 5wt% and a plasticizer of 40wt% Citrate ester; after melting, the polymerization reaction is carried out at a temperature of 300°C under the action of the addition of 1wt% of potassium hydroxide as a catalyst. During the polymerization reaction, 10wt% of the functional assistant anti-ultraviolet agent salicylic acid is added to obtain The target polymer with a number average molecular weight of 20,000. The polymerization reaction is completed in a screw extruder. The screw extruder includes a screw, an extrusion motor connected to the screw, a heating ring, a temperature sensor and a metering pump; the screw is a twin screw with a long diameter The ratio is 48, the pitch is equal, the helix angle is 18°, the groove depth is 3.5mm, and the surface roughness is Ra0.8; the ...

Example Embodiment

[0045] Example 3

[0046] A functional fiber-grade 3D printing method based on reactive extrusion. The lactam monomer enantolactam and the lactone monomer enantolactone with an additive amount of 0.5wt% urethane and an additive amount of 15wt% of the plasticizer gallium chloride; after melting, the polymerization reaction is carried out at a temperature of 250℃ under the action of a stable compound formed by the addition of 0.08wt% of the catalyst methyl group and sodium. During the polymerization reaction, add 0.9wt% of functional additives, anion generating material, Qibing Stone, to obtain the target polymer with a number average molecular weight of 10,000. The polymerization reaction is completed in a screw extruder. The screw extruder includes a screw, an extrusion motor connected to the screw, and heating Ring, temperature sensor and metering pump; the screw is three-screw, the ratio of length to diameter is 45, the pitch is equal, the helix angle is 16°, the groove depth i...

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PUM

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Abstract

The invention relates to a functional fiber-grade 3D printing method based on reactive extrusion. A lactam monomer and/or lactone monomer, an assistant and a plasticizer are fused and have a polymerization reaction under the catalyst effect, a functional agent is added before polymerization or in the polymerization process, and target polymer is obtained; the target polymer is subject to fused deposition 3D printing, and then subject to heat treatment, and a final product is obtained; and according to heat treatment, heat preservation is carried out for 3 min to 60 min at the temperature ranging from 100 DEG C to 180 DEG C. A high-precision high-adapting 3D printer is adopted, the molding precision is high, the efficiency is high, the mechanical property of the product is good, and functional components are good in dispersibility; a technology for directly making the product from the polymeric monomer is adopted, the production flexibility is improved, and meanwhile, the condition that due to crystallization and the large temperature difference of semi-crystalline polymer of nylon, polyester and the like, edge warping is caused, and even printing cannot be carried out is avoided; and the kind of the fused deposition 3D printing material is widened, the quality of the product is improved, and the method has the wide application to the fields of automobile materials, engineering materials, structural parts and the like.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and relates to a functional fiber-level 3D printing method based on reaction extrusion, in particular to a 3D printing method directly from a monomer to a product. Background technique [0002] 3D printing technology is a rapid prototyping technology that is gradually becoming popular at present. This is a green desktop rapid prototyping technology, which has the advantages of small size, low cost, low pollution, and convenient use. The basic principle is to use polymer materials as the base material, adopt fused accumulation molding or fused deposition molding technology, complete the structure and formation of object pairs by layer-by-layer printing, and finally form products by layer-by-layer stacking, which can be built layer by layer under precise positioning. various three-dimensional objects. [0003] Using the characteristics of 3D printing, it can be controlled by software, and thro...

Claims

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Application Information

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IPC IPC(8): B29C67/00B33Y10/00B33Y50/02B33Y30/00B33Y40/00
CPCB33Y10/00B33Y30/00B33Y40/00B33Y50/02
Inventor 陈烨王朝生王华平汤廉江振林王敏鹏
Owner DONGHUA UNIV
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