Method for enhancing strength of 3D printed products

A 3D printing and product technology, applied in the field of 3D printing, can solve the problems of parts scrapping, cracking, breaking, etc., and achieve the effect of improving strength, expanding the scope of use, and increasing the strength of parts

Active Publication Date: 2016-03-02
SICHUAN CHANGHONG ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some special thin-walled parts in this field will produce certain deformations during assembly, such as hooks and buckles, and the parts printed by FDM will easily lead to the bonding between layers along the Z stacking direction when deformation occurs. cracked or even broken, resulting in scrapped parts
At present, there is no technology that can effectively solve this problem

Method used

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  • Method for enhancing strength of 3D printed products
  • Method for enhancing strength of 3D printed products
  • Method for enhancing strength of 3D printed products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1 Using the method of the present invention to increase the strength of 3D printing products

[0036] image 3 It is a schematic diagram of the shape and printing direction of a 3D printed hook part. exist image 3 It can be seen from the figure that the size of the Y and Z directions accumulated by the hook parts during 3D printing is much larger than the X direction, and the X direction size is 2mm, and the parts are easily broken due to the extrusion force in the X direction when the hook is assembled. .

[0037] The raw material of the hook part is obtained by 3D printing of acrylonitrile-butadiene-styrene plastic (ABS). Take 50 parts of its powder by weight and dissolve it in 50 parts of ethyl acetate, stir to make it fully dissolve and stand still to obtain a solution. In the fume hood, use a metal sprayer to evenly spray the solution on the surface of the part parallel to the Y-Z plane. When the junction of the accumulation layer is filled, stop sp...

Embodiment 2

[0038] Embodiment 2 Using the method of the present invention to increase the strength of 3D printing products

[0039]The specification of the 3D printed part in this embodiment is the same as that of the 3D printed part in Embodiment 1, and it is obtained by printing with ABS material. Take 10 parts by weight of the raw material ABS powder for printing the part as a solute, take 50 parts by weight of ethyl acetate and 40 parts of acetone as a solvent, mix these three raw materials, stir them to fully dissolve and let stand. Use a brush to evenly coat the weak surface of the part in a ventilated place. When the junction of the accumulation layer is filled, stop brushing, wait for the solvent to evaporate completely, and then take out the reinforced 3D printed hook part.

Embodiment 3

[0040] Embodiment 3 Using the method of the present invention to increase the strength of 3D printing products

[0041] The specifications of the 3D printed parts in this embodiment are the same as those in the first embodiment, and they are printed with polycarbonate (PC) materials. Take 5 parts by weight of the raw material PC powder for printing the part as the solute, take 20 parts by weight of chloroform, 40 parts of methyl ethyl ketone, and 35 parts of tetrahydrofuran as the solvent, mix these four raw materials, stir them to fully dissolve and let stand to obtain a solution. In the fume hood, use a metal sprayer to evenly spray the solution on the weak surface of the part. When the junction of the accumulation layer is filled, stop spraying, wait for the solvent to evaporate completely, and then take out the enhanced 3D printed hook part.

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Abstract

The invention belongs to the field of a 3D printing technology and specifically relates to a method for enhancing strength of 3D printed products. The invention aims to solve the technical problem that strength of 3D printed products, especially 3D printed products printed by a fused deposition modeling method in the part-forming Z direction is poor. A raw material of the printed part product is a solute, and a cooperative solvent can effectively dissolve a shallow surface layer of the product. Thus, the shallow surface layer of the product and the solute are fused as a whole. Juncture of 3D printed stack layers is effectively filled, shallow surface layer strength of the juncture is increased, and strength of the 3D printed product is further enhanced. By the method, strength of parts is enhanced, and dimension of parts is basically not changed. The method is very beneficial to expand application range of special plastic parts 3D printed by an FDM technology. The technical problem that has existed in the field all the time is solved. The method has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and in particular relates to a method for increasing the strength of 3D printing products. Background technique [0002] 3D printing technology is integrated and developed on the basis of modern CAD / CAM technology, laser technology, computer numerical control technology, precision servo drive technology and new material technology. At present, 3D printing technology is mainly divided into fusion lamination molding technology (FDM), liquid photosensitive resin laser curing technology (SLA), selective laser sintering technology (SLS), selective laser melting technology (SLM), 3DP technology, DLP laser Molding technology, etc. Different types of rapid prototyping systems have different forming principles and system characteristics due to the different forming materials used, but the basic principles are the same, and they all adopt "layer-by-layer manufacturing and layer-by-layer superposition"...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/02C08J3/11C08L55/02C08L67/04C08L69/00C08L77/00
CPCC08J3/11C08J7/02C08J2355/02C08J2367/04C08J2369/00C08J2377/00
Inventor 彭德权潘晓勇刘勇
Owner SICHUAN CHANGHONG ELECTRIC CO LTD
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