A discharge device and implementation method for selective laser sintering powder in the fiber orientation in the pink

Abstract

The invention discloses an implementation method and a layout device for fiber orientation in selective laser sintering powder spreading. The layout device comprises a powder spreading roller, a hopper device and an orientation supporting frame. The powder spreading roller and the hopper device are arranged on two sides of a workbench, the bottom of the hopper device is provided with a guide groove, and the orientation supporting frame is mounted in the guide groove at the bottom of the hopper device. The implementation method includes: a layer of powder is spread on an operating plane by thepowder spreading roller, then fibers in regular array are spread on the powder layer under the joint action of the hopper device and the orientation supporting frame, powder spreading is performed again after sintering of a layer, an angle between a transverse rod and a longitudinal rod of the orientation supporting frame is changed, the fibers are spread again, and the process is repeated. Compared with the prior art in which fibers are messy in sintered powder, the implementation method and the layout device simple in structure have advantages that the fibers can be effectively controlled tobe arrayed according to a designed direction, and the problem of anisotropy in existing fiber composite powder material sintered samples is effectively solved.

Description

technical field [0001] The invention belongs to the field of selective laser sintering, in particular to an arranging device and implementation method for fiber orientation in selective laser sintering powder laying. [0002] technical background [0003] Selective Laser Sintering (SLS for short) is a rapid prototyping technology widely used at present. Control the laser beam to scan and sinter the preheated heat-fusible powder material layer by layer according to the slice level data information until the scanning and forming of the final cross-sectional layer is completed. This technology has the characteristics of simple manufacturing process, high flexibility, wide range of material selection, high utilization rate, low cost and fast molding speed, etc., and is receiving more and more attention. [0004] At present, SLS technology has a wide selection of materials, including: polymer materials, metals, ceramic powders, coated sand, etc. Taking the most widely used nylon...

AI Technical Summary

Problems solved by technology

However, the existing technologies and methods cannot effectively control the orientation and arrangement of fiber materials in the powder, and the mechanical properties of the parts are isotropic, which limits the further application of fiber reinforced materials in selective laser sintering.

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