Aerial 3D prints material extrusion and material-supporting device
Technical field
The present invention relates to aerial 3D and print material extrusion and material-supporting device, belong to 3D printing technique field.
Background technology
Since the mankind invented the 3D printing technique, a few year 3D printed the life that has just entered the ordinary citizen, but that 3D is printed on military sciemtifec and technical sphere is with fastest developing speed, particularly were applied to research and development and the trial-production of military equipment, had accelerated military development of science and technology widely.What yet 3D printed maximum area in the world also can only be several square metres, and this has just formed obstruction to the big industrialization development direction of 3D printing.
Summary of the invention
The purpose of this invention is to provide a kind of aerial 3D that can utilize the 3D printing technique to print infinitely great object and print material extrusion and material-supporting device.
Aerial 3D prints material extrusion and material-supporting device, comprise the material extrusion device formed by conical pipe, taper material extrusion screw rod, feed hopper, square tube, connecting shaft etc. and by retainer plate, scrape the material-supporting device that powder runner, receiving hopper, the straight tube that connects material etc. are formed; The taper big opening end of conical pipe up, the conical pipe big opening end is connected with the feed hopper of bigger bell namely, a taper material extrusion screw rod is installed in the conical pipe, there is a connecting shaft upper end of taper material extrusion screw rod, connecting shaft connecting band mantle shape material extrusion screw rod motor rotating, the osculum end of conical pipe down, and link to each other with one section square tube, a square tube and conical pipe end mutually far away is that the lower end has an oblique square opening, distance tiltedly has a retainer plate in setpoint distance position of square opening under the oblique square opening, two parts of first three branch of retainer plate be the retainer plate operation when moving 2/3rds parts of direction of advance be horizontal flat board, back three/part is oblique striker plate, back three/part becomes the knuckle at one 100 ° ~ 150 ° of angles and makes the up perk of oblique striker plate with two parts of first three branch, the oblique striker plate top of perk has that an energy freely rotates scrapes the powder runner, can rotate and the powder of downside is scraped off at the object downside that prints when its effect is the retainer plate operation; There is individual receiving hopper the retainer plate below, retainer plate is connected with receiving hopper by three legs, and the lower end of receiving hopper exports the straight tube that connects material, and the straight tube lower end that connects material is connected with flexible pipe, the bucket body that connects material is connected with supporting arm, and supporting arm also links to each other with conical pipe and supporting conical pipe and feed hopper simultaneously; It is characterized in that:
1, after the powder of printing for 3D enters feed hopper, got into conical pipe by taper material extrusion screw rod with slower speed, and slowly be extruded from the oblique square opening of the square tube lower end that links to each other with conical pipe osculum end, the powder that slowly is extruded falls on the retainer plate of oblique square opening below continuously, and powder is fallen into to be squeezed lightly behind the retainer plate on retainer plate and in the middle of not making the powder that falls the space is arranged, in the multiple laser constriction, squeeze into powder like this and when in powder, crossing, the temperature of joint sharply raises, and is shaped thereby make powder form heat cure; The powder that is not cured directly falls into the receiving hopper of retainer plate below, and recycles through connect material straight tube and flexible pipe; Distance between the oblique square opening in square tube lower end of material extrusion device and the retainer plate of material-supporting device can be regulated, and the thickness of printing objects is more thick, and tiltedly the distance between square opening and the retainer plate is more big.
2, scraping the powder runner is connected by connecting rod with oblique striker plate, connecting rod is installed in the groove on oblique striker plate top, near oral region on the groove groove limiting block is arranged in the groove, there is a connecting rod limiting block lower end of connecting rod, the connecting rod limiting block is installed in the below of groove limiting block, connecting rod can be done move up and down in groove but the connecting rod limiting block can not shift out the groove limiting block, the connecting rod periphery is equipped with a spring, the spring roof pressure connecting rod, thereby make and scrape the powder runner and scrape when the object lower of printing-forming, can along printing objects may be that irregular or rough lower surface moves and can contact with the lower surface of printing objects all the time, and then scrape the lower surface of printing objects and the powder that the lower surface of printing objects sticks scraped and fall into retainer plate and receiving hopper.
3, supporting arm connects simultaneously and supports the material extrusion device of being made up of conical pipe, taper material extrusion screw rod, feed hopper, square tube, connecting shaft, with the supporting by retainer plate, scrape the material-supporting device that powder runner, receiving hopper, the straight tube that connects material etc. are formed, material extrusion device and material-supporting device are with the synchronous equidirectional movement of supporting arm.
The present invention compared with prior art has the following advantages:
1, existing 3D PRN device is to print in fixing powder heap, so the area maximum of printing has only several square metres; The aerial material extrusion of movable type of the present invention and retainer are printed flexibly, and print area can accomplish that " infinitely " is big.
Description of drawings
Fig. 1 is the generalized section of the embodiment of the invention;
Fig. 2 is middle P enlarged drawing embodiment illustrated in fig. 1;
Fig. 3 is Q enlarged drawing among Fig. 2.
Among Fig. 1-3: 1, supporting arm 2, flexible pipe 3, straight tube 4 connects material, retaining collar 5, leg 6, receiving hopper 7, retainer plate 8, oblique square opening 9, square tube 10, taper material extrusion screw rod 11, conical pipe 12, connecting shaft 13, feed hopper 14, scrape powder runner 15, spring 16, connecting rod 17, oblique striker plate 18, connecting rod limiting block 19, groove limiting block 20, telescopic spring district 21, scrape the powder runner shaft.
The specific embodiment
In the embodiment shown in Fig. 1-3: aerial 3D prints material extrusion and material-supporting device, comprise the material extrusion device formed by conical pipe 11, taper material extrusion screw rod 10, feed hopper 13, square tube 9, connecting shaft 12 etc. and by retainer plate 7, scrape powder runner 14, receiving hopper 6, material-supporting device that the straight tube 3 that connects material etc. is formed; The taper big opening end of conical pipe 11 up, conical pipe 11 big opening ends are connected with the feed hopper of bigger bell namely, a taper material extrusion screw rod 10 is installed in the conical pipe 11, there is a connecting shaft 12 upper end of taper material extrusion screw rod 10, connecting shaft 12 connecting band mantle shape material extrusion screw rods 10 motor rotating, the osculum end of conical pipe 11 down, and link to each other with one section square tube 9, square tube 9 and conical pipe 11 ends mutually far away are that the lower end has an oblique square opening 8, distance tiltedly has a retainer plate 7 in 8 one setpoint distance positions of square opening under the oblique square opening 8, two parts of first three branch of retainer plate 7 be retainer plate 7 operations when moving 2/3rds parts of direction of advance be horizontal flat board, back three/part is oblique striker plate 17, back three/part becomes the knuckle at one 100 ° ~ 150 ° of angles and makes the up perk of oblique striker plate 17 with two parts of first three branch, oblique striker plate 17 tops of perk have that an energy freely rotates scrapes powder runner 14, can rotate and the powder of downside is scraped off at the object downside that prints when its effect is retainer plate 7 operations; There is individual receiving hopper 6 retainer plate 7 belows, retainer plate 7 is connected with receiving hopper 6 by three legs 5, the lower end of receiving hopper 6 exports the straight tube 3 that connects material, straight tube 3 lower ends that connect material are connected with flexible pipe 2, receiving hopper 6 bodies are connected with supporting arm 1, and supporting arm 1 also links to each other with conical pipe 11 and supporting conical pipe 11 and feed hopper 13 simultaneously; It is characterized in that: after being used for powder that 3D prints and entering feed hopper 13, got into conical pipe 11 by taper material extrusion screw rod 10 with slower speed, and slowly be extruded from the oblique square opening 8 of square tube 9 lower ends that link to each other with conical pipe 11 osculum ends, the powder that slowly is extruded falls on the retainer plate 7 of oblique square opening 8 belows continuously, and powder is fallen into to be squeezed lightly behind the retainer plate 7 on retainer plate 7 and in the middle of not making the powder that falls the space is arranged, concentrate at multiple laser like this and squeeze into powder and when in powder, crossing, the temperature of joint sharply raises, and is shaped thereby make powder form heat cure; The powder that is not cured directly falls into the receiving hopper 6 of retainer plate 7 belows, and recycles through connect material straight tube 3 and flexible pipe 2; Distance between the oblique square opening 8 in square tube 9 lower ends of material extrusion device and the retainer plate 7 of material-supporting device can be regulated, and the thickness of printing objects is more thick, and tiltedly the distance between square opening 8 and the retainer plate 7 is more big.
Scraping powder runner 14 is connected by connecting rod 16 with oblique striker plate 17, connecting rod 16 is installed in the groove on oblique striker plate 17 tops, near oral region on the groove groove limiting block 19 is arranged in the groove, there is a connecting rod limiting block 18 lower end of connecting rod 16, connecting rod limiting block 18 is installed in the below of groove limiting block 19, connecting rod 16 can be done move up and down in groove but connecting rod limiting block 18 can not shift out groove limiting block 19, connecting rod 16 peripheries are equipped with a spring 15, spring 15 roof pressures connecting rod 16, thereby make and scrape powder runner 14 and scrape when the object lower of printing-forming, can along printing objects may be that irregular or rough lower surface moves and can contact with the lower surface of printing objects all the time, and then scrape the lower surface of printing objects and the powder that the lower surface of printing objects sticks scraped and fall into retainer plate 7 and receiving hopper 6.
Supporting arm 1 connects simultaneously and supports the material extrusion device of being made up of conical pipe 11, taper material extrusion screw rod 10, feed hopper 13, square tube 9, connecting shaft 12, with supporting by retainer plate 7, scrape powder runner 14, receiving hopper 6, material-supporting device that the straight tube 3 that connects material etc. is formed, material extrusion device and material-supporting device are with supporting arm 1 synchronous equidirectional movement.