3D printer with nozzle cleaning function

Abstract

The invention relates to a 3D printer with a nozzle cleaning function. The 3D printer comprises a housing, wherein an operation observing port is formed in the front side of the housing; a 3D printinghead, a moving device for driving the 3D printing head to move, a printing platform for moulding a printing material and a cleaning device for cleaning waste shreds are arranged inside the housing; the cleaning device comprises a waste box, a scraper and a scraper height compensating structure; a waste inlet is formed in the upper side of the waste box; the cleaning device further comprises a waste box height adjusting mechanism; the moving device drives the 3D printing head to enable a printing nozzle to be in contact with the scraper to achieve primary cleaning, and then drives the 3D printing head to move reversely to achieve secondary cleaning. After the adoption of the scheme, the 3D printer with the nozzle cleaning function, provided by the invention, is simple in structure, easy and convenient to operate and high in stability and overcomes many shortcomings of the conventional cleaning device.

Description

technical field [0001] The invention relates to a 3D printer, in particular to a 3D printer with a nozzle cleaning function. Background technique [0002] 3D printer, a machine of rapid prototyping technology, is a technology based on digital model files and using bondable materials such as powdered metal or plastic to construct objects by layer-by-layer printing. In the past, it was often used to make models in the fields of mold manufacturing and industrial design, and is now gradually being used in the direct manufacture of some products. [0003] The existing mainstream 3D printing technologies mainly include four types: stereolithography (SLA), three-dimensional powder bonding (3DP), selective laser sintering (SLS), and fused deposition rapid prototyping (FDM). Among them, although 3D printers based on photolithography technology, three-dimensional powder bonding technology and selective laser sintering technology have high precision and a wide range of applicable mate...

AI Technical Summary

Problems solved by technology

[0006] 1. The waste filament will arrive at the printing platform earlier than the actual printing material during the belting process, and will accumulate under the actual printing material, causing a bulging convex hull, resulting in a decrease in model accuracy and even printing failure;

[0007] 2. The waste filaments fall off naturally from the printing nozzle and mix into the mechanical parts inside the 3D printer, causing hardware damage;

[0008] 3. The waste filament adheres to the surroundings of the printing nozzle. After long-term high-temperature oxidation, it turns into a black liquid and drips onto the surface of the model, which not only affects the appearance of the model, but may also cause plugging for a long time

However, the above two cleaning methods still have certain deficiencies when applied to actual work:

[0013] 1. None of the cleaning devices has a height adjustment function. After the wiping material is consumed, the Z-axis cannot be calibrated and compensated through height adjustment, resulting in the cleaning device needing to frequently replace the wiping material;

[0014] 2. It does not have a complete waste filament processing function. Although the latter cleaning device has a waste filament box, when it is necessary to dump the waste filament in the waste box, the staff needs to reach into the equipment to remove the waste box and remove it from the printing nozzle and the nozzle. Taking out between printing platforms, on the one hand, the operation method is extremely inconvenient, on the other hand, due to the limited internal space of the equipment, it is easy to collide with other components inside the equipment during the picking and placing process, which will affect the printing accuracy and service life;

[0015] 3. There is no perfect suitable structure for the printing nozzle. During the cleaning process, the position of the wiping cotton and the blade and the end of the printing nozzle must be extremely accurate, otherwise the cleaning effect will be greatly reduced. Moreover, the latter cleaning device is located on the side of the waste box due to the scraper The wall must be in contact with the scraper in one direction, otherwise the waste filament will fall to the top of the printing platform, and the cleaning device will become superfluous

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