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Implementation method of selective laser sintering (SLS) technology and fiber implantation device

A technology of laser sintering and implementation method, which is applied in processing and manufacturing, additive processing, solid material additive processing, etc., can solve the problems of low strength impact strength, low strength, and low strength of molded parts, and achieve fiber aspect ratio Improvement, high-strength use requirements, and the effect of increasing strength

Inactive Publication Date: 2013-03-27
广州市锐鼎机电设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the powder material is laser sintered, the strength of the molded part is low. The main reason for the low strength is its loose texture and low density.
Although mixing glass fiber, glass microspheres, mineral fiber, carbon fiber and other reinforcing materials in the powder material can increase the strength of the molded part, the arrangement of these reinforcement materials in the powder material is disorderly and disorderly, and the reinforcement material is in the molded product. The ratio of length to diameter is low, resulting in the strength of the final molded part, especially the impact strength is still low, which cannot meet the mechanical performance test requirements of molded parts or the performance requirements for direct use as final products

Method used

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  • Implementation method of selective laser sintering (SLS) technology and fiber implantation device
  • Implementation method of selective laser sintering (SLS) technology and fiber implantation device
  • Implementation method of selective laser sintering (SLS) technology and fiber implantation device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] see figure 1 , the fiber implantation device of the present invention is mainly composed of a base 1 arranged on a slide rail 2 and a fiber conveyor 4 connected to the base 1, wherein,

[0045] see figure 1 , the slide rail 2 is a motion mechanism with four degrees of freedom, the four degrees of freedom are linear motion along the X-axis, Y-axis and Z-axis direction and rotation around the Z-axis, each movement is controlled by a separate Driven by stepper motors, these stepper motors are controlled by the control system, so that the base 1 connected to the slide rail 2 realizes movement in the X-axis, Y-axis and Z-axis directions and rotation around the Z-axis; the specific implementation method can be Refer to the slide rail mechanism of the worktable in the CNC machining center.

[0046] see Figure 1-7, the fiber conveyor 4 is mainly composed of a bracket, a traction roller group, an auxiliary roller group and a cutting mechanism 7, wherein the bracket is a casi...

Embodiment approach

[0049] see Figure 8 , Figure 9 with Figure 10 , the implementation method of selective laser sintering process of the present invention, comprises the following steps:

[0050] (1) The working cylinder 11 is lowered by a certain distance, and the powder supply cylinder 12 is raised by a certain distance, and the powder spreading device 13 spreads a single layer or multiple layers of sintered powder material 14 on the sintering working plane 9 to form a bottom layer of sintered powder material 14-1 ;

[0051] (2) Lay a fiber layer on the bottom sintered powder material layer 14-1 by using a fiber implantation device, the laying process is as follows:

[0052] (2.1) The slide rail 2 in the fiber implantation device moves the fiber conveyor 4 to the target position under the control of the control system; the fiber conveyor 4 simultaneously outputs a plurality of continuous long fiber filaments 8 in parallel, 8, the fiber conveyor 4 moves back, so that these output fiber f...

Embodiment 2

[0061] see Figure 9 , In this embodiment, two sets of fiber implantation devices are used, and the fiber conveyors 4 in the two sets of fiber implantation devices are arranged obliquely opposite to each other, and the fiber filaments 8 output by the two intersect each other. In the two fiber implantation devices, an angle adjustment motor 17 is provided at the connecting joint between the support in the fiber conveyor 4 and the base 1, and the angle adjustment motor 17 is a stepping motor controlled by a control system, thereby realizing Automatic adjustment of the inclination angle of the stand. Other implementations of the fiber implantation device of this embodiment are the same as those of Embodiment 1.

[0062] see Figure 9 with Figure 10 , the implementation method of the selective laser sintering process of this embodiment is realized by using the above two sets of fiber implantation devices, and its difference from the implementation method of Example 1 is:

[0...

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Abstract

The invention discloses an implementation method of a selective laser sintering (SLS) technology and a fiber implantation device. The implementation method comprises the following steps: when sintering, implanting fibrous layers which are composed of fibers with high length-diameter ratio and ordered arrangement into sintered powder, wherein after sintering, the fibrous layers are wrapped in the sintered molded piece, specifically, the fibrous layers can be formed by sequentially arranging fiber yarns or fiber bundles and the like in the sintered powder layers by virtue of the fiber implantation device or paving fiber clothes or fiber felts. According to the implementation method of selective laser sintering technology disclosed by the invention, every sintered layer is implanted with the fibrous layer composed of fibers with high length-diameter ratio and ordered arrangement, compared with the condition that short and unordered fibers are mixed in the sintered powder in the prior art, the method disclosed by the invention has the advantages that the length-diameter ratios of the fibers in the sintered layer are greatly increased, and the fibers are arranged in order, so that the strength of a molded piece is greatly improved, and thus the molded piece can meet the use requirement with higher strength.

Description

technical field [0001] The invention relates to an implementation method of a selective laser sintering process and equipment used in the method, in particular to an implementation method of a selective laser sintering process and a fiber implantation device. Background technique [0002] Selective Laser Sintering (SLS) is a widely used rapid prototyping technology at present. The principle of the forming process is: firstly establish a computer 3D model of the target part, and then use layered software to slice the 3D model. , to obtain the data information of each processing level, under the control of the computer, according to the slice level information, use the laser beam to scan and sinter the heat-fusible powder material layer by layer to complete the manufacturing of the target processing. The advantage of this technology is that it is not limited by the complexity of the shape of the parts, does not require any tooling and molds, has high speed and high efficiency,...

Claims

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Application Information

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IPC IPC(8): B29C67/00
CPCB29C70/38B29C70/16B29C67/0077B29C67/04B29C70/382B29C64/153B33Y10/00
Inventor 余金文凌毅
Owner 广州市锐鼎机电设备有限公司
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