A selective laser sintering device and method for directional arrangement of carbon fibers using gasification mold

Abstract

The invention discloses a selective laser sintering device using a gasified pattern for carbon fiber directional arrangement. The selective laser sintering device specifically comprises a base, a worktable, a conveying mechanism, a powder laying mechanism, an adsorption mechanism, a laser scanning system, a purifier, a housing and the carbon fiber gasified pattern; and the carbon fiber gasified pattern includes a certain number of carbon fiber filaments which are parallel in direction, and the carbon fiber gasified pattern is gasified during laser sintering. The implementing method of selective laser sintering comprises the steps that after a layer of powder is laid, a vacuum suction cup is driven through the conveying mechanism to place the carbon fiber gasified pattern on the powder layer, the gasified pattern is gasified through laser sintering, harmful gas is absorbed by the purifier, the placing direction of the carbon fiber gasified pattern is changed through a hollow rotating platform, then laser sintering is conducted, and the steps are conducted repeatedly in this way till sample sintering is completed. The method provides a solution for directional arrangement of carbon fiber materials in the powder laying process, and the problem of anisotropy of mechanical properties of carbon fiber sintered parts is effectively solved.

Description

technical field [0001] The invention relates to the field of selective laser sintering, in particular to a selective laser sintering device and method for directional arrangement of carbon fibers using a gasification mold. Background technique [0002] Selective laser sintering is a kind of additive manufacturing technology. Its working principle is as follows: firstly, a layer of powder material is laid on the workbench, the laser is controlled by computer, and the solid part of the powder is sintered according to the interface contour information, and then continuously circulated. , forming layers upon layers. This kind of forming method has simple manufacturing process, high flexibility, wide range of material selection, low material price, high utilization rate and fast forming speed, so it is widely used. [0003] At present, the main materials include plastic powder, nylon powder, metal powder, ceramic powder and composite powder. Among them, nylon powder, as a semi-...

AI Technical Summary

Problems solved by technology

However, the existing technologies and methods cannot effectively control the orientation arrangement of carbon fiber materials in the powder. Among the existing technical solutions for controlling the direction of carbon fibers, such as "a guide for fiber orientation in selective laser sintering of fiber composite powder" "Device and Implementation Method" (CN105904732A) can control the arrangement of carbon fibers in different directions in the sintered layer of the sample, but in its actual operation, the fibers and powder are spread together, which easily leads to poor powder spreading performance, thus affecting the spread of the powder. Powder layer density and surface quality, etc.

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