阅读说明：本技术 一种3d打印金属粉末回收利用装置 (3D prints metal powder recycle device ) 是由 何朝升 于 2021-01-06 设计创作，主要内容包括：本发明公开的一种3D打印金属粉末回收利用装置,本发明包括主体,所述主体内左侧下端设有开口向下且开口向左的清扫腔,所述清扫腔上下滑动设有收集盘,所述收集盘下端设有收集盘腔,所述收集盘腔圆周壁密集分布设有开口向外的收集孔,所述收集盘外圆面和下端面固定设有毛刷,本发明通过对金属粉末进行收集,且在收集的过程中能对已经完成3D打印的零件进行清扫,通过在金属3D打印和金属粉末回收过程中源源不断的通入氮气或者氩气,避免在打印和收集过程中产生静电或者火花产生爆炸危险,而且本发明同时对收集的金属粉末进行利用,利用模具进一步加工生产一些要求较低的零件。(The invention discloses a 3D printing metal powder recycling device, which comprises a main body, a cleaning cavity with a downward opening and a leftward opening is arranged at the lower end of the left side in the main body, a collecting disc is arranged in the cleaning cavity in a vertically sliding manner, the lower end of the collecting tray is provided with a collecting tray cavity, the circumferential wall of the collecting tray cavity is densely distributed with collecting holes with outward openings, the outer circular surface and the lower end surface of the collecting disc are fixedly provided with the hairbrushes, the invention collects metal powder and can clean parts which are subjected to 3D printing in the collecting process, by continuously introducing nitrogen or argon in the processes of 3D metal printing and metal powder recovery, the explosion danger caused by static electricity or sparks generated in the processes of printing and collecting is avoided, in addition, the collected metal powder is utilized, and the die is utilized to further process and produce parts with lower requirements.)

1. The utility model provides a 3D prints metal powder recycle device, includes the main part, its characterized in that: the lower end of the left side in the main body is provided with a cleaning cavity with a downward opening and a leftward opening, the cleaning cavity is provided with a collecting disc in a vertical sliding manner, the lower end of the collecting disc is provided with a collecting disc cavity, the circumferential wall of the collecting disc cavity is densely distributed with collecting holes with outward openings, the outer circumferential surface and the lower end surface of the collecting disc are fixedly provided with brushes, the upper end of the collecting disc cavity is communicated with a lower collecting channel, the lower side of the circumferential wall of the lower collecting channel is rotatably provided with a screwed pipe, the lower end of the screwed pipe is fixedly connected with the middle of the upper end surface of the collecting disc, the outer circumferential surface of the screwed pipe is sleeved with a lifting sleeve in a threaded connection manner, the upper end of the cleaning cavity is communicated with a lifting cavity, the outer circumferential surface of the lifting sleeve is rotatably connected with the circumferential wall of the lifting cavity, the outer circumferential, the upper end of the lower collecting channel extends and penetrates through the threaded pipe, a recycling box cavity is arranged on the right side of the lower collecting channel, a recycling box is fixedly arranged in the recycling box cavity, a mixing cavity is arranged at the left end in the recycling box, recycling cavities are arranged in the recycling box and the right side of the mixing cavity, stirring devices are arranged in the mixing cavity and the recycling cavity and comprise threaded sleeves rotatably arranged on the lower end wall of the mixing cavity, a stirring plate is fixedly sleeved on the outer circular surface of each threaded sleeve and can rotate in the circular wall of the mixing cavity, a feeding cavity is arranged on the lower side of the mixing cavity, the lower end of each threaded sleeve extends to the upper end wall of the feeding cavity, a material conveying cavity is arranged in each threaded sleeve, a stirring transmission rod is fixedly arranged on the circular wall of the material conveying cavity, an upper collecting channel is arranged on the mixing cavity and the recycling cavity, and a transmission rod is rotatably arranged between the left end wall and the, the right end of the transmission rod is fixedly provided with an impeller, the right side of the upper collecting channel is communicated with an air outlet, the middle position in the air outlet is fixedly provided with an exhaust fan, a filter screen is fixedly arranged between the right end wall of the upper collecting channel and the left end wall of the air outlet, the upside of the front end wall and the rear end wall of the filter screen is rotatably provided with a filler door, the right end of the impeller can scrape the metal powder adsorbed on the left end surface of the filter screen, a recycling sleeve is fixedly arranged between the lower end wall of the upper collecting channel and the upper end wall of the recycling cavity, a right collecting channel which penetrates through the recycling sleeve up and down and communicates the upper collecting channel with the recycling cavity is arranged in the recycling sleeve, the right side of the air outlet is provided with an additive cavity with an upward opening, the lower side of the air outlet is provided with a lower collecting channel which communicates, a sealing block is arranged between the upper end wall and the lower end wall of the upper collecting channel in a left-right sliding manner, a sealing spring is fixedly connected between the left end surface of the sealing block and the right end wall of the feeding cavity, a feeding block is arranged between the upper end wall and the lower end wall of the feeding cavity and on the right side of the sealing block in a left-right sliding manner, a feeding cavity is arranged in the feeding block in a vertical penetrating manner, a rack is fixedly arranged on the front end surface of the feeding block, an extrusion cavity which is in cross communication with the feeding cavity is arranged in the upper end wall and the lower end wall of the feeding cavity, an upper extrusion block is arranged on the upper end wall of the extrusion cavity in a vertically sliding manner, an upper die is fixedly arranged on the lower end face of the upper extrusion block, a lower extrusion block is arranged on the lower end wall of the extrusion cavity in a vertically sliding manner, a lower die is fixedly arranged on the upper end surface of the lower extrusion block, the right side of the lower end wall of the feeding cavity is communicated with a collecting block cavity, a collecting block is arranged in the collecting block cavity in a rotating mode, and a collecting cavity is formed in the collecting block in a circumferential array mode.

2. The 3D printing metal powder recycling device according to claim 1, characterized in that: go up collection channel lower end wall with it is fixed between the recovery box chamber upper end wall to be equipped with agitator motor, agitator motor lower extreme power connection has the stirring transmission shaft, the stirring transmission shaft lower extreme passes the recovery box upper end and extends to pass in the material chamber, the outer disc of stirring transmission shaft lower extreme with stirring transmission pole fixed connection.

3. The 3D printing metal powder recycling device according to claim 1, characterized in that: the collecting device is characterized in that a lifting transmission cavity is formed in the rear side of the lower collecting channel, a lifting motor is arranged on the lower side of the lifting transmission cavity and is right opposite to and fixed to the lower side of the lifting transmission cavity, a lifting shaft is connected to the upper end of the lifting motor in a power mode, and a lifting gear is fixedly arranged in the lifting transmission cavity and extends to the upper end of the lifting shaft.

4. The 3D printing metal powder recycling device according to claim 1, characterized in that: a feeding transmission cavity is arranged at the right side of the middle part of the front side of the feeding cavity and is positioned at the right side of the lifting transmission cavity, a transmission cavity is arranged at the lower side of the feeding transmission cavity, a feeding motor is fixedly arranged at the left end of the upper side of the transmission cavity and opposite to the lower side of the feeding transmission cavity, the upper end and the lower end of the feeding motor are in power connection with a feeding shaft, the upper end of the feeding shaft at the upper side extends into the feeding transmission cavity and is fixedly provided with a feeding gear, the feeding gear is engaged with the front end face of the rack, the lower side of the feeding shaft at the lower end extends into the transmission cavity and is fixedly provided with a driving belt wheel, a conversion cavity is arranged at the upper side of the transmission cavity, a driven pulley shaft is rotatably arranged at the right side of the upper end wall of the transmission cavity, the upper end of the driven pulley shaft extends into the conversion cavity, a driven pulley is fixedly arranged at the lower end of the driven pulley shaft, and a belt is connected between the driven pulley and the driving pulley.

5. The 3D printing metal powder recycling device according to claim 1, characterized in that: the upper side of the extrusion cavity is provided with an upper hydraulic pump, the lower end of the upper hydraulic pump is in power connection with an upper hydraulic rod, the lower end of the upper hydraulic rod is fixedly connected with the upper end face of the upper extrusion block, the lower side of the extrusion cavity is fixedly provided with a lower hydraulic pump, the upper end of the lower hydraulic pump is in power connection with a lower hydraulic rod, and the upper end of the lower hydraulic rod is fixedly connected with the lower end face of the lower extrusion block.

6. The 3D printing metal powder recycling device according to claim 1, characterized in that: the collecting block lower end wall is provided with a collecting shaft in a rotating mode, the upper end of the collecting shaft is fixedly connected with the central position of the lower end face of the collecting block, the lower end of the collecting shaft extends into the conversion cavity, a spline block is arranged in the conversion cavity in an up-down sliding mode, a spline is arranged in the spline block in an up-down penetrating mode and in a rotating mode, the upper end of the spline can be connected with a spline at the lower end of the collecting shaft, the lower end of the spline is connected with a spline at the upper end of a driven belt wheel shaft, an electromagnet is fixedly arranged on the upper end wall of the conversion cavity, and a conversion spring is fixedly.

Technical Field

The invention relates to the field of 3D printing, in particular to a 3D printing metal powder recycling device.

Background

The metal powder recovery difficulty is high in the 3D printing process of metal, when workers manually recover the metal powder, the metal is easily oxidized due to the fact that the metal is in contact with oxygen in the air, at the moment, if sparks or flames easily explode, the metal powder after 3D printing is quenched due to the high temperature effect in the laser processing process, the powder structure is changed, the metal powder cannot be scrapped when used for 3D printing, and a large amount of waste can be generated.

Disclosure of Invention

In order to solve the problems, the 3D printing metal powder recycling device comprises a main body, wherein a cleaning cavity with a downward opening and a leftward opening is arranged at the lower end of the left side in the main body, a collecting disc is arranged in the cleaning cavity in a vertically sliding mode, a collecting disc cavity is arranged at the lower end of the collecting disc, collecting holes with outward openings are densely distributed in the circumferential wall of the collecting disc cavity, brushes are fixedly arranged on the outer circumferential surface and the lower end surface of the collecting disc, a lower collecting channel is communicated with the upper end of the collecting disc cavity, a threaded pipe is rotatably arranged on the lower side of the circumferential wall of the lower collecting channel, the lower end of the threaded pipe is fixedly connected with the middle of the upper end surface of the collecting disc, a lifting sleeve is sleeved on the outer circumferential surface of the threaded pipe and is in threaded connection with the lifting sleeve, a lifting cavity is communicated with the upper end of the cleaning cavity, and the outer circumferential surface of the lifting, a sealing washer is fixedly arranged on the lower side of the outer circular end wall of the lifting cavity, the inner circular surface of the sealing washer is rotatably connected with the lower end of the outer circular surface of the lifting sleeve, the upper end of the lower collecting channel extends and penetrates through the threaded pipe, a recycling box cavity is arranged on the right side of the lower collecting channel, a recycling box is fixedly arranged in the recycling box, a mixing cavity is arranged at the left end in the recycling box, recycling cavities are arranged in the recycling box and the right side of the mixing cavity, a stirring device is arranged in the mixing cavity and the recycling cavity and comprises a threaded sleeve rotatably arranged on the lower end wall of the mixing cavity, a stirring plate is fixedly sleeved on the outer circular surface of the threaded sleeve and can rotate in the circular wall of the mixing cavity, a feeding cavity is arranged on the lower side of the mixing cavity, the lower end of the threaded sleeve extends to the upper end wall of the feeding cavity, a material conveying cavity is arranged in the threaded sleeve, the mixing chamber and the recycling chamber are provided with an upper collecting channel, a transmission rod is rotatably arranged between the left end wall and the right end wall of the upper collecting channel, an impeller is fixedly arranged at the right end of the transmission rod, an air outlet is communicated with the right side of the upper collecting channel, an exhaust fan is fixedly arranged at the middle position in the air outlet, a filter screen is fixedly arranged between the right end wall of the upper collecting channel and the left end wall of the air outlet, a filler door is rotatably arranged at the upper side of the front end wall and the rear end wall of the filter screen, the right end of the impeller can scrape metal powder adsorbed on the left end surface of the filter screen, a recycling sleeve is fixedly arranged between the lower end wall of the upper collecting channel and the upper end wall of the recycling chamber, a right collecting channel which penetrates through the upper collecting channel and the recycling chamber from top to bottom is arranged in the recycling sleeve, an additive chamber with an upward opening is arranged at, a feeding door is rotatably arranged on the left side between the front end wall and the rear end wall of the lower collecting channel, a sealing block is arranged between the upper end wall and the lower end wall of the upper collecting channel in a left-right sliding manner, a sealing spring is fixedly connected between the left end surface of the sealing block and the right end wall of the feeding cavity, feeding blocks are arranged between the upper end wall and the lower end wall of the feeding cavity and between the sealing block and the sealing block in a left-right sliding manner, a feeding cavity is arranged in the feeding block in an up-down penetrating manner, a rack is fixedly arranged on the front end surface of the feeding block, extrusion cavities which are in cross communication with the feeding cavity are arranged in the upper end wall and the lower end wall of the feeding cavity, an upper extrusion block is arranged on the upper end wall of the extrusion cavity in an up-down sliding manner, an upper die is fixedly arranged on the lower end surface of the upper extrusion block, a lower die is fixedly arranged on the upper end surface, and the inner circumference array of the collecting block is provided with collecting cavities.

Preferably, a stirring motor is fixedly arranged between the lower end wall of the upper collecting channel and the upper end wall of the cavity of the recycling box, the lower end of the stirring motor is in power connection with a stirring transmission shaft, the lower end of the stirring transmission shaft penetrates through the upper end of the recycling box and extends into the material conveying cavity, and the outer circular surface of the lower end of the stirring transmission shaft is fixedly connected with the stirring transmission rod.

Preferably, the rear side of the lower collecting channel is provided with a lifting transmission cavity, the lower side of the lifting transmission cavity is opposite to and fixedly provided with a lifting motor, the upper end of the lifting motor is connected with a lifting shaft in a power mode, and the upper end of the lifting shaft extends to a lifting gear which is fixedly arranged in the lifting transmission cavity.

Preferably, a feeding transmission cavity is arranged at the right side of the lifting transmission cavity and in the middle of the front side of the feeding cavity, a transmission cavity is arranged at the lower side of the feeding transmission cavity, a feeding motor is fixedly arranged at the left end of the upper side of the transmission cavity and opposite to the lower side of the feeding transmission cavity, the upper end and the lower end of the feeding motor are in power connection with a feeding shaft, the upper end of the feeding shaft at the upper side extends into the feeding transmission cavity and is fixedly provided with a feeding gear, the feeding gear is engaged with the front end face of the rack, the lower side of the feeding shaft at the lower end extends into the transmission cavity and is fixedly provided with a driving belt wheel, a conversion cavity is arranged at the upper side of the transmission cavity, a driven pulley shaft is rotatably arranged at the right side of the upper end wall of the transmission cavity, the upper end of the driven pulley shaft extends into the conversion cavity, a driven pulley is fixedly arranged at the lower end of the driven pulley shaft, and a belt is connected between the driven pulley and the driving pulley.

Preferably, an upper hydraulic pump is arranged on the upper side of the extrusion cavity, an upper hydraulic rod is connected to the lower end of the upper hydraulic pump in a power mode, the lower end of the upper hydraulic rod is fixedly connected with the upper end face of the upper extrusion block, a lower hydraulic pump is fixedly arranged on the lower side of the extrusion cavity, a lower hydraulic rod is connected to the upper end of the lower hydraulic pump in a power mode, and the upper end of the lower hydraulic rod is fixedly connected with the lower end face of the lower extrusion block.

Preferably, the lower end wall of the collecting block is rotatably provided with a collecting shaft, the upper end of the collecting shaft is fixedly connected with the center of the lower end face of the collecting block, the lower end of the collecting shaft extends into the conversion cavity, a spline block is arranged in the conversion cavity in an up-down sliding manner, a spline is arranged in the spline block in an up-down penetrating and rotating manner, the upper end of the spline can be connected with a spline at the lower end of the collecting shaft, the lower end of the spline is connected with a spline at the upper end of the driven belt wheel shaft, an electromagnet is fixedly arranged on the upper end wall of the conversion cavity, and a conversion spring is fixedly connected with the upper end wall of.

The invention has the beneficial effects that: according to the invention, the metal powder is collected, the parts which are subjected to 3D printing can be cleaned in the collection process, and the nitrogen or argon is continuously introduced in the metal 3D printing and metal powder recovery processes, so that the generation of static electricity or explosion danger caused by sparks in the printing and collection processes is avoided.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic view of the overall structure of a 3D printing metal powder recycling device according to the present invention;

FIG. 2 is a sectional view of the structure taken along the line A-A in FIG. 1;

FIG. 3 is a sectional view of the structure taken along the line B-B in FIG. 2;

FIG. 4 is a sectional view of the structure taken along the line C-C in FIG. 1;

FIG. 5 is an enlarged view of the structure at D in FIG. 1;

fig. 6 is an enlarged view of a structure at E in fig. 1.

Detailed Description

The invention will now be described in detail with reference to fig. 1-6, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

The invention relates to a 3D printing metal powder recycling device, which comprises a main body 10, wherein a cleaning cavity 65 with a downward opening and a leftward opening is arranged at the lower end of the left side in the main body 10, a collecting disc 76 is arranged in the cleaning cavity 65 in a vertically sliding manner, a collecting disc cavity 64 is arranged at the lower end of the collecting disc 76, collecting holes 63 with outward openings are densely distributed in the circumferential wall of the collecting disc cavity 64, brushes 61 are fixedly arranged on the outer circumferential surface and the lower end surface of the collecting disc 76, a lower collecting channel 74 is communicated with the upper end of the collecting disc cavity 64, a screwed pipe 36 is rotatably arranged on the lower side of the circumferential wall of the lower collecting channel 74, the lower end of the screwed pipe 36 is fixedly connected with the middle of the upper end surface of the collecting disc 76, a lifting sleeve 38 is sleeved on the outer circumferential surface of the screwed pipe 36 and is in threaded connection with the upper end surface of the lifting sleeve 38, a lifting cavity 39, a sealing washer 75 is fixedly arranged on the lower side of the end wall of the outer circle of the lifting cavity 39, the inner circular surface of the sealing washer 75 is rotatably connected with the lower end of the outer circular surface of the lifting sleeve 38, the upper end of the lower collecting channel 74 extends and penetrates through the threaded pipe 36, the right side of the lower collecting channel 74 is provided with a recycling box cavity 40, a recycling box 66 is fixedly arranged in the recycling box cavity 40, the left end in the recycling box 66 is provided with a mixing cavity 19, the recycling cavity 21 is arranged in the recycling box 66 and the right side of the mixing cavity 19, stirring devices are arranged in the mixing cavity 19 and the recycling cavity 21 and comprise a threaded sleeve 37 rotatably arranged on the lower end wall of the mixing cavity 19, a stirring plate 35 is fixedly sleeved on the outer circular surface of the threaded sleeve 37, the stirring plate 35 can rotate in the circumferential wall of the mixing cavity 19, a feeding cavity 15 is arranged on the lower side of the mixing cavity 19, and the lower end of the, be equipped with in the thread bush 37 and pass material chamber 62, pass material chamber 62 circumference wall upper end and fixedly be equipped with stirring transfer line 34, mixing chamber 19 with it collects passageway 30 to be equipped with on retrieving chamber 21, it is equipped with transfer line 31 to rotate between the end wall about collecting passageway 30 to go up, the fixed impeller 28 that is equipped with of transfer line 31 right-hand member, it is equipped with air exit 25 to go up the intercommunication of collecting passageway 30 right side, the fixed air exhauster 26 that is equipped with of intermediate position in the air exit 25, go up collecting passageway 30 right side end wall with it is fixed to be equipped with filter screen 27 to rotate between the end wall of air exit 25 left side, end wall upside rotates around filter screen 27 and is equipped with filler door 77, impeller 28 right-hand member can be with the absorption under the metal powder of filter screen 27 left end face scrapes, go up collecting passageway 30 under the end wall with it retrieves to fix between the chamber 21 upper end wall to be equipped with and retrieves set 29, it runs through and 23, an additive cavity 24 with an upward opening is arranged on the right side of the air outlet 25, a lower collecting channel 74 for communicating the recovery cavity 21 with the additive cavity 24 is arranged on the lower side of the air outlet 25, a feeding door 22 is rotatably arranged on the left side between the front end wall and the rear end wall of the lower collecting channel 74, a sealing block 42 is arranged on the left side between the upper end wall and the lower end wall of the upper collecting channel 30 in a left-right sliding manner, a sealing spring 41 is fixedly connected between the left end surface of the sealing block 42 and the right end wall of the feeding cavity 15, a feeding block 43 is arranged between the upper end wall and the lower end wall of the feeding cavity 15 and on the right side of the sealing block 42 in a left-right sliding manner, a feeding cavity 44 is arranged in the feeding block 43 in an up-down penetrating manner, a rack 78 is fixedly arranged on the front end surface of the feeding block 43, extrusion cavities 14 which are in cross communication with the feeding cavity 15, the lower end face of the upper extrusion block 17 is fixedly provided with an upper die 16, the lower end wall of the extrusion cavity 14 is provided with a lower extrusion block 46 in a vertically sliding mode, the upper end face of the lower extrusion block 46 is fixedly provided with a lower die 45, the right side of the lower end wall of the feeding cavity 15 is communicated with a collection block cavity 11, a collection block 12 is arranged in the collection block cavity 11 in a rotating mode, and a collection cavity 13 is arranged in the collection block 12 in an array mode.

Advantageously, a stirring motor 32 is fixedly arranged between the lower end wall of the upper collecting channel 30 and the upper end wall of the recycling bin cavity 40, a stirring transmission shaft 33 is dynamically connected to the lower end of the stirring motor 32, the lower end of the stirring transmission shaft 33 extends into the material conveying cavity 62 through the upper end of the recycling bin 66, and the outer circumferential surface of the lower end of the stirring transmission shaft 33 is fixedly connected with the stirring transmission rod 34.

Beneficially, the rear side of the lower collecting channel 74 is provided with a lifting transmission cavity 54, the lower side of the lifting transmission cavity 54 is opposite to and fixedly provided with a lifting motor 58, the upper end of the lifting motor 58 is in power connection with a lifting shaft 52, and the upper end of the lifting shaft 52 extends into the lifting transmission cavity 54 and is fixedly provided with a lifting gear 53.

Beneficially, a feeding transmission cavity 57 is arranged on the right side of the lifting transmission cavity 54 and on the middle right side of the front side of the feeding cavity 15, a transmission cavity 49 is arranged on the lower side of the feeding transmission cavity 57, a feeding motor 59 is fixedly arranged on the left end of the upper side of the transmission cavity 49 and on the lower side of the feeding transmission cavity 57, feeding shafts 55 are dynamically connected to the upper and lower ends of the feeding motor 59, the upper ends of the upper feeding shafts 55 extend into the feeding transmission cavity 57 and are fixedly provided with feeding gears 56, the feeding gears 56 are engaged with the front end face of the rack 78, the lower ends of the lower feeding shafts 55 extend into the transmission cavity 49 and are fixedly provided with driving pulleys 60, a conversion cavity 68 is arranged on the upper side of the transmission cavity 49, a driven pulley shaft 67 is rotatably arranged on the right side of the upper end wall of the transmission cavity 49, the upper end of the driven pulley shaft 67 extends into the conversion cavity 68, and a driven pulley, a belt 50 is connected between the driven pulley 51 and the driving pulley 60.

Beneficially, an upper hydraulic pump 20 is arranged on the upper side of the extrusion chamber 14, an upper hydraulic rod 18 is dynamically connected to the lower end of the upper hydraulic pump 20, the lower end of the upper hydraulic rod 18 is fixedly connected to the upper end face of the upper extrusion block 17, a lower hydraulic pump 48 is fixedly arranged on the lower side of the extrusion chamber 14, a lower hydraulic rod 47 is dynamically connected to the upper end of the lower hydraulic pump 48, and the upper end of the lower hydraulic rod 47 is fixedly connected to the lower end face of the lower extrusion block 46.

Beneficially, the lower end wall of the collection block 12 is rotatably provided with a collection shaft 72, the upper end of the collection shaft 72 is fixedly connected with the center position of the lower end face of the collection block 12, the lower end of the collection shaft 72 extends into the conversion cavity 68, a spline block 70 is slidably arranged in the conversion cavity 68 up and down, a spline 69 is vertically penetrated and rotatably arranged in the spline block 70, the upper end of the spline 69 can be in spline connection with the lower end of the collection shaft 72, the lower end of the spline 69 is in spline connection with the upper end of the driven pulley shaft 67, the upper end wall of the conversion cavity 68 is fixedly provided with an electromagnet 71, and the upper end wall of the conversion cavity 68 and the upper end face of the spline block 70 are fixedly connected with a conversion spring 73.

The use steps herein are described in detail below with reference to fig. 1-6:

in an initial working state, the cleaning cavity 65 and the 3D printing working cavity are mounted in a superposition manner, the collecting disc 76 is at an upper limit position, the sealing spring 41 is in a relaxed state, the sealing block 42 is at a left limit position, the upper extrusion block 17 is at an upper limit position, the lower extrusion block 46 is at a lower limit position, the switching spring 73 is in a tensioned state, the spline block 70 is at a lower limit position, and the electromagnet 71 is in a power-off state.

In operation, the lifting motor 58 is started, thereby driving the lifting shaft 52 to rotate, thereby driving the lifting gear 53 to rotate, thereby driving the lifting sleeve 38 to rotate, thereby driving the threaded pipe 36, the collecting disc 76 and the brush 61 to move downwards due to the threaded connection between the lifting sleeve 38 and the threaded pipe 36, meanwhile, the exhaust fan 26 is powered on to exhaust air, the metal powder in the cleaning cavity 65 is adsorbed to the left end surface of the filter screen 27 through the upper collecting channel 30, the lower collecting channel 74, the collecting disc cavity 64 and the collecting holes 63, the impeller 28 rotates under the action of wind power to scrape the metal powder adsorbed on the left end surface of the filter screen 27 down to fall into the recovery cavity 21 through the right collecting channel 23 for collection, when all the metal powder in the cleaning cavity 65 is cleaned up, the lifting motor 58 stops rotating, then the lifting motor 58 is reversely started to reset the threaded pipe 36, the collecting disc 76 and the brush 61, at this time, the exhaust, when parts are required to be processed by utilizing recycled metal powder, a user opens the filling door 77 to add a mixing agent, the feeding motor 59 is started to drive the feeding shaft 55 to rotate, the feeding gear 56 is driven to rotate, the rack 78 and the feeding block 43 are driven to move leftwards, the sealing block 42 is driven to move leftwards when the sealing block 42 is contacted, the feeding motor 59 stops rotating when the feeding block 43 moves to the position where the feeding cavity 44 is opposite to the material conveying cavity 62, the stirring motor 32 is started to drive the stirring transmission shaft 33 to rotate, the stirring transmission rod 34, the threaded sleeve 37 and the stirring plate 35 are driven to rotate, the metal powder and the additive in the mixing cavity 19 are stirred and mixed, the mixture is conveyed into the material conveying cavity 62 under the action of the stirring plate 35 and falls into the feeding cavity 44 and is filled, the stirring motor 32 stops rotating, the feeding shaft 55 is started to rotate reversely at the moment to drive the feeding block 43 to the feeding cavity 44 to be aligned with the right moving cavity 14 to add the mixture When the extrusion chamber 14 is filled with the molding material, the feeding shaft 55 stops rotating and is started in a forward transmission manner so as to drive the feeding block 43 to reset, the upper hydraulic pump 20 is started so as to drive the upper hydraulic rod 18, the upper extrusion block 17 and the upper die 16 to move downwards and extrude the mixture in the extrusion chamber 14, the upper hydraulic pump 20 stops extruding after the mixture is extruded and molded under the common action of the extrusion chamber 14 and the lower die 45, then the upper hydraulic pump 20 reversely moves so as to drive the upper hydraulic rod 18, the upper extrusion block 17 and the upper die 16 to reset, the lower hydraulic pump 48 is started so as to drive the lower hydraulic rod 47, the lower extrusion block 46 and the lower die 45 to move upwards and push the extruded and molded part into the feeding chamber 15, the feeding motor 59 continuously starts in a reverse rotation manner so as to enable the feeding block 43 to move rightwards and push the molded part to be aligned with the collection chamber 13 in the collection block 12, and the molded part falls to the bottom of the collection, at the moment, the feeding motor 59 stops rotating and then continues forward transmission starting to drive the feeding block 43 to reset, then the feeding motor 59 is started to repeatedly rotate forward and backward to perform multiple extrusion forming and convey into the collecting cavity 13, when one collecting cavity 13 is filled with formed parts, the electromagnet 71 is electrified to drive the driving belt wheel 60 to rotate when the feeding motor 59 rotates, the driven belt wheel 51 is driven to rotate under the action of the belt 50, the driven belt wheel shaft 67 is driven to rotate, the spline 69 is connected with the collecting shaft 72 through the adsorption effect of the electromagnet 71, the collecting block 12 is driven to rotate, and when the feeding cavity 15 is aligned with the next full collecting cavity 13, the electromagnet 71 is powered off.

The invention has the beneficial effects that: according to the invention, the metal powder is collected, the parts which are subjected to 3D printing can be cleaned in the collection process, and the nitrogen or argon is continuously introduced in the metal 3D printing and metal powder recovery processes, so that the generation of static electricity or explosion danger caused by sparks in the printing and collection processes is avoided.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.