3D printing raw material and 3D printing method and 3D printing workpiece adopting same

A 3D printing and raw material technology, applied in the field of 3D molding, can solve the problems of long printing time, unfavorable fiber mechanical properties, increase equipment utilization time and manufacturing cost, etc., achieve the increase of printing single layer thickness, increase printing speed, and ensure mechanical properties Effect

Active Publication Date: 2018-12-21
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Based on the definition of printing, it is given that the printing process is in the form of layer-by-layer slice printing and layer-by-layer superposition, especially the fused deposition method (FDM) selects linear or powdery materials, which are deposited and solidified layer by layer, with the highest speed It can reach 500mm/s. For large parts, the printing time is too long, which increases the equipment utilization time and manufacturing cost; this is not conducive to the production of large-sized parts
[0004] In addition, 3D printed parts currently have insufficient mechanical properties. The tensile strength of parts printed with pure resin is less than 100 MPa, and the tensile stre

Method used

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  • 3D printing raw material and 3D printing method and 3D printing workpiece adopting same
  • 3D printing raw material and 3D printing method and 3D printing workpiece adopting same

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0062] Example 1

[0063] Print structure obtained by printing by bonding block unit

[0064] figure 1 It shows a three-layer printing structure formed by printing with adhesive block units. The block unit selects two types of fiber content: 65%v, size 5mm×5mm×10mm, and fiber content: 65%v, size 5mm×5mm×15mm, The materials are all carbon fiber reinforced PA6, the surface is smooth and coated with epoxy quick-drying glue. Print form: Use two kinds of blocks alternately on the first layer, and use one block of 5mm×5mm×15mm for both layers.

[0065] Effect: After using this printing form, the use of high-fiber content units in the material increases the overall fiber content of the block unit; in the printing form, the print layer gaps are alternately staggered, which improves the anti-cracking ability between layers and ensures the Z direction In terms of printing speed, the printing speed of the whole body is increased to 10 times of the original.

Example Embodiment

[0066] Example 2

[0067] Printed structure obtained by soldering block unit

[0068] figure 2 It shows a two-layer printing structure formed by printing with a welding block unit. The block unit selects two types of fiber content of 60%v, size of 10mm×10mm×15mm, and fiber content of 60%v, size of 5mm×10mm×10mm. All are carbon fiber reinforced PP, with multiple welding lines with a height of 0.5mm (adjacent distance of 2mm) on the surface. Print form: Two layers of blocks of two large and small units are arranged according to a certain rule.

[0069] Effect: After using this printing form, the fiber content of the printed part is increased to 60%v; the mechanics of the printed part in all directions are improved, and the resistance to cracking of the part is improved; the printing speed of the entire body is increased to the original 8 Times.

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Abstract

The invention provides a 3D printing raw material and a 3D printing method and 3D printing product adopting the same. The printing raw material comprises a plurality of block units, wherein a materialof one random block unit is a fiber reinforced thermoplastic resin material. The method comprises: S1, preparing the 3D printing raw material, which comprises: using the block units as 3D printing units, and according to slice analysis of a to-be-printed component, obtaining the block units which need to be used by each printing layer; forming the blocking units of each printing layer; and coating the surfaces of all the formed block units with an adhesive or arranging welding lines on the surfaces of all the block units; S2, according to the obtained block units of each printing layer, sequentially printing each printing layer layer by layer, and carrying out adhesion connection by the adhesive or carrying out welding connection by the welding lines among the printing layers. The invention can solve the technical problems that when a continuous fiber reinforced material is adopted to prepare the 3D printing product currently, the obtained product is poor in mechanical property and for a large product, a printing speed is low.

Description

technical field [0001] The invention relates to the technical field of 3D molding, in particular to a 3D printing raw material, a 3D printing method and a 3D printing part. Background technique [0002] 3D printing technology is an advanced manufacturing technology integrating machinery, materials, automation, and software. It is also a low-cost, automated advanced molding method that has been given high expectations. Meet people's needs for customization and personalization. So, what is 3D printing technology? The American Society for Testing and Materials gave a definition: "A method that is diametrically opposed to the traditional material removal processing method, by adding materials, based on 3D CAD model data, usually using a layer-by-layer manufacturing method, directly manufacturing a material that is completely consistent with the corresponding mathematical model The manufacturing method of the three-dimensional physical solid model." (Feng Chunmei, Yang Jiquan, ...

Claims

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Application Information

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IPC IPC(8): B29C64/141B29C64/165B33Y70/00
CPCB33Y70/00B29C64/141B29C64/165
Inventor 毕向军唐中华方旭东王红丽路建军缪伟民邓延
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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