Device and method for removing redundant sand of 3D printing sand mould in magnetic control vibration mode

Abstract

The invention relates to technologies for clearing away redundant sand at a mould cavity portion of a 3D printing sand mould, in particular to a device and method for removing redundant sand of the 3Dprinting sand mould in a magnetic control vibration mode. The device for removing redundant sand of the 3D printing sand mould in the magnetic control vibration mode comprises a box; a supporting frame for storing the 3D printing sand mould is arranged in the box; a sand collecting device is arranged on the lower side of the supporting frame; the top and the side portion of at least one side of the box are provided with winding coils for generating an alternating magnetic field; a plurality of sand removing particles made of a magnetic material are arranged in the box; and under the action ofthe alternating magnetic field, the sand removing particles vibrate to impact the redundant sand of the 3D printing sand mould off gradually from the surface layer of the sand mould so that the mouldcavity of the sand mould can be formed, and the redundant sand is collected by the sand collecting device. According to the device, the alternating magnetic field is generated through the winding coils to control the sand removing medium particles made of the magnetic material to vibrate at a high frequency to impact the redundant sand in the mould cavity off layer by layer, and the efficiency and automation level of sand removing are greatly improved.

Description

technical field [0001] The invention relates to the technical field of sand mold 3D printing, in particular to a technology for cleaning excess sand material in a cavity of a 3D printed sand mold, which is suitable for cleaning excess material of sand molds or sand cores using powder / sand 3D printing. Background technique [0002] 3D printing additive manufacturing technology has developed rapidly in recent years and is known as the key technology that will open and lead the fourth industrial revolution. There are many ways to realize 3D printing additive manufacturing technology. One of the common realization principles is the layer-by-layer selective hardening method, that is, laying materials in the entire layer thickness direction, and making the area that will become a part be laser sintered or sprayed. Adhesives and other methods are used to cure, and then a layer of material is laid to continue printing. When the print is complete, the excess material on the unharden...

AI Technical Summary

Problems solved by technology

[0005] The invention aims at the problem of inconvenient removal of excess sand material in the cavity after sand molds with complex inner cavity structures are formed by 3D printing of particles / powder in the prior art, and provides a device for removing excess sand material from 3D printed sand molds by magnetically controlled vibration , so that the alternating magnetic field generated by multiple winding coils can control the high-frequency vibration of the sand-cleaning medium particles of the magnetic material to shoot down the excess sand in the cavity layer by layer, greatly improving the sand-cleaning efficiency and sand-cleaning automation level

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