A selective laser sintering printer suitable for multi-powder

Abstract

The invention discloses a selective laser sintering printer suitable for multi-powder, which includes a frame, a powder storage device, a powder supply device, a powder spreading device, a molding device, a laser scanning module and a powder recovery device; wherein, the storage The powder device includes a plurality of powder storage tanks for storing different powder materials and a powder storage cabinet for arranging the powder storage tanks; the molding device includes a molding cavity, and the laser scanning module is located above the molding cavity; the supply The powder device includes a handling robot for taking out the powder storage tank from the powder storage cabinet and sending it to the top of the molding cavity. The bottom of the powder storage tank controls the control valve of the switch of the blanking; The tank is transferred from the powder storage cabinet to the top of the molding cavity, the control valve in the powder storage tank is opened, and the powder falls into the molding cavity from the powder outlet channel. The selective laser sintering printer can be used for sintering printing of a variety of different materials without powder mixing, effectively ensuring the printing quality of parts.

Description

technical field [0001] The invention relates to 3D printing equipment, in particular to a selective laser sintering printer suitable for multi-powder bodies. Background technique [0002] 3D printing, also known as Additive Manufacturing (AM), integrates technologies such as computer-aided design, material processing and molding technology, and digital model files. Based on digital model files, printing materials ( For example, metal materials, plastic materials, and medical biomaterials, etc.) are formed "bottom-up" layer by layer; different from traditional forming processing technologies (mainly "subtractive" processing on raw materials, such as cutting, grinding, etc.) , 3D printing technology is a "from scratch" manufacturing technology through material accumulation, which can realize processing that is difficult to achieve with traditional molding technology, and make up for the shortcomings of traditional molding technology. [0003] At present, the molding process o...

AI Technical Summary

Problems solved by technology

[0004] The traditional laser sintering printing technology can only print one or two kinds of metal powders, and it is difficult to complete the mixed printing of many different types of powders at the same time. The laser sintering printing equipment of materials, for example, the invention patent with the authorized announcement number CN 105618755 B discloses a powder supply and spreading method and device for 3D printing of multi-material parts. The powder supply and spreading device includes a powder supply unit and a The powder spreading unit below the powder supply unit, the powder supply unit includes a plurality of powder supply funnels, a plurality of connecting pipes and a powder homogenizer, and the plurality of connecting pipes connect the bottom of each powder supply funnel with the powder homogenizer; The powder spreading unit The powder spreading unit includes a powder spreading box and a powder collection box, the top plate of the powder collecting box is provided with a surplus powder collection port and is used to collect excess powder materials above the powder spreading box and the forming platform

Although the above-mentioned multi-material printing device can be used for printing a variety of different materials, there are the following problems: a variety of different powders (different powders correspond to different layers of the part) need to pass through the same channel (powder uniformity) device) to fall onto the forming platform, although the time of passing through the homogenizer is different, there may be some residue in the homogenizer, if the remaining powder is mixed with different powder materials, it will affect the molding of the target part quality

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