Magnetic sealing guide rail system and powder laying system suitable for powder sintering equipment

Abstract

The invention discloses a magnetic sealing guide rail system and a powder laying system suitable for powder sintering equipment. The magnetic sealing guide rail system comprises a rail, a lateral protection plate, an inner protection plate, a cover plate located above the rail, a T-shaped guide bridge, a guide rail cover, a sliding assembly and a transmission assembly, wherein the lateral protection plate and the inner protection plate are located on the two sides of the rail. The middle of the cover plate is provided with a slot body, the two sides of the slot body are provided with permanent magnets, a cavity is formed among the lateral protection plate, the inner protection plate, the cover plate, the guide bridge and an iron magnetic component, and the transmission assembly, the sliding assembly and the rail are located in the cavity; and the transmission assembly is connected with the sliding assembly, drives the sliding assembly to move back and forth along the rail in the cavity and drives the inclined face of the guide bridge to pry the iron magnetic component up and move back and forth along the slot body. According to the magnetic sealing guide rail system and the powder laying system suitable for the powder sintering equipment, through the structure of the guide rail system in combination with the absorption function of the permanent magnets on iron materials, quite good sealing performance is achieved, and the magnetic sealing guide rail system and the powder laying system are compact and stable in structure, simple and reliable and low in cost.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and in particular relates to a magnetic seal rail system and a powder spreading system suitable for powder sintering equipment. Background technique [0002] In the powder sintering equipment used in 3D printing, the powder spreading action is realized by the driving mechanism driving the powder spreading device to move back and forth on the guide rails. The commonly used structure is that one end of the powder spreading device is fixed on two parallel guide rails, and the driving mechanism (generally It is the motor) to drive the timing belt, and the timing belt is fixed with the powder spreading device. When the motor rotates, it drives the powder spreading device to move back and forth on the guide rail, so as to realize the function of powder spreading. The other end of the powder spreading device is suspended in the air. The biggest disadvantage of this cantilever structure powder spread...

AI Technical Summary

Problems solved by technology

The other end of the powder spreading device is suspended in the air. The biggest disadvantage of this cantilever structure powder spreading device is that the fixed end slightly shakes, resulting in a large vibration at the suspended end, which affects the smoothness of the powder spreading surface and thus affects the accuracy of the workpiece.

And because the working environment of the powder sintering equipment is harsh, the entire use process is in a dust environment with a diameter of 60 microns to 100 microns, so it is necessary to isolate the working chamber from the guide rail. The components used in the prior art are steel belts driven by coil springs. However, the life of the coil spring is relatively low, so the entire part of the steel belt needs to be replaced for a period of time, and the replacement is more troublesome, resulting in inconvenience in use and an increase in cost. In order to solve this problem, this structure needs to be improved

[0003] At present, some researchers are also researching the issue of sealing to realize the automatic sealing of the track, such as patent 201610329058.X, but this kind of track-type guide structure needs to achieve flexible movement, and its processing accuracy is high, and the processing cost is high; the two workpieces require sliding cooperation. The surface finish is high, and its mechanical form determines its processing difficulty; and this kind of guiding structure generally requires a corresponding self-lubricating structure

In addition, when the mechanism is moving, the small particles on the upper surface of the elastic protective belt originally attached will enter the inner cavity of the guide rail when the elastic protective belt is deformed in the longitudinal direction, which cannot play a good role. Although the structure has a protruding shielding piece on its upper part, there is a gap between the protruding shielding piece and the upper surface of the elastic protection, and it is still impossible to remove the small particles attached to the upper surface of the elastic protective belt during the movement. Better shielding and removal of objects, so the modified structure is not suitable for working in the dust environment of particles with a diameter of 60 microns to 100 microns

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