A kind of 3D printing equipmentTechnical field
The present invention relates to a kind of 3D printing equipment, which can print hemispherical by the shell of multiple progressive formingsSolid, the equipment belong to 3D printing field.
Background technology
3D printing is a kind of process mathematical model being manufactured as 3 D stereo object.Wherein printing is one additionalProcess, in this process, by establishing continuous printable layer previous on printable layer, with " growth " this object.3D is beatenPrint is different from other moldings or manufacturing technology, these technologies may rely on filling mold or material removal, such as cuts or boreHole.Currently, most 3D printing equipment in the market, which is all made of cartesian coordinate system, carries out three-dimensional coordinate positioning, in printing spherical shape threeWhen dimension module, need to drive multiple actuators to carry out locations of contours, which increase the calculation amounts of computing platform, and it is negative to increase equipmentLotus.Secondly current printing device mostly using cartesian coordinate due to being positioned, while nozzle setting is unreasonable, causes to printSpherical threedimensional model more have Roughen Edges profile, cause model usually not smooth enough.
Invention content
To solve the above problems, the present invention provides a kind of 3D printing equipment, the equipment includes：Print head, printing are flatPlatform, the first sliding equipment, the second sliding equipment, first motor, the second motor, electric rotating machine；
The first motor, the second motor, electric rotating machine output end be separately connected the first sliding equipment, the second skate machineThe input terminal of structure, print platform；
The upper surface of the print platform includes disk rail, and the input terminal of the disk rail is as the print platformInput terminal；
The print head is fixed on the first sliding equipment, and first sliding equipment and the sliding of the second sliding equipment connectIt connects, drives print head on disk rail with the second sliding equipment relative motion, the direction of the relative motion is perpendicular to diskThe radial direction of track；
Second sliding equipment can move radially on the disk rail, and then drive the print head radiallyIt is mobile；
The disk rail can be driven the rotation done centered on any on disk rail in horizontal plane by electric rotating machineMovement, it is preferable that on the disk rail is some the center of circle of disk rail.
Preferably, the entrance of the print head includes multiple silk chambers, for inputting multichannel silk, the multiple silk chamberA runner is merged into downwards in the inside of print head；The end of the print head includes nozzle, and the end of the nozzle includesPlate hole, the plate hole form mixing chamber with runner；Each silk chamber is also configured with silk dispatching controller, for control silk intoEnter the speed of mixing chamber；The lower end of the silk chamber is additionally provided with the first heating element, for melting silk.
Preferably, the second heating element is installed at the nozzle, for heating mixed silk, second heatingElement is the film resistor for being wound in inner nozzle surface.
Preferably, silk dispatching controller includes two rotating wheels, and the direction of rotation of two rotating wheels is on the contrary, can be withThe speed that silk enters mixing chamber is controlled according to the rotary speed of rotating wheel.
Preferably, first sliding equipment is also associated with support extension arm, can be used for printhead support.
Preferably, first sliding equipment is also associated with support extension arm, can be used for printhead support.
Preferably, the flow angle in the exit of the nozzle is 75 ° -90 °.
Preferably, the vertical height of the flow angle is 10 millimeters -20 millimeters.
Preferably, the mixing chamber is ring pipe, and the inside of the ring pipe includes rabbling mechanism, the rabbling mechanism packetInclude helical blade, electric screw axis.
Advantageous effect
Compared with the relevant technologies, a kind of 3D printing equipment provided by the invention has the advantages that：
3D printing equipment provided by the invention can by disk rail rotate with the second sliding equipment move radially fromAnd the circular contour printing of horizontal direction is completed, then coordinate the first sliding equipment perpendicular to mobile completion three-dimensional radiallySmooth curved surface prints, such as spherical construction, wherein being made of multiple rings independently formed per layer material.By the way that disk rail is arrangedRoad, disk rail connect the second sliding equipment, and the second sliding equipment connects the first sliding equipment, forms spheric coordinate system in this way,Computer computation complexity is reduced, need to only control a motor every time can create a hemisphere with continuous boundary profileShape object prevents printing device from frozen plug occurring at work, prolongs by the way that the first heating element and the second heating element is arrangedThe operating time of long printing device, the nozzle of print head keep nozzle easily accessible partly there are one the flow angle from 75 degree to 90 degreeSpherical object, this makes the hemisphere to be formed not have apparent step edges profile, keeps printing workpiece more smooth.Setting four simultaneouslyA silk dispenses controller, controls silk speed, keeps the uniformity of material on matrix.The longitudinal length of nozzle cone part is setIt sets between 10 millimeters to 20 millimeters, prevents the condensation of material at nozzle, keep printing device stream time long, printModel it is more smooth.
Description of the drawings
Fig. 1 is the schematic diagram that 3D printing equipment is printed by controller；
Fig. 2 is the schematic diagram that 3D printing equipment prints a hemispherical objects；
Fig. 3 is 3D printing equipment print head viewgraph of cross-section；
In figure：Print head 1, silk dispatching controller 2, the second sliding equipment 3, the first sliding equipment 4, the first heating element5, silk chamber 6, silk 7, nozzle 8, mixing chamber 9, substrate 10, material layer 11, working face 12, motion controller 13, plate hole 14, circleDisk track 15, the first driving motor 16, support extension arm 17, the second driving motor 18, print platform 19, circular material 20, rotationRotating motor 21, the second heating element 22, rabbling mechanism 23, flow angle 24.
Specific implementation mode
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is the partial sectional view of 3D printing equipment, and the 3D printing equipment is by successively printing multiple continuous thin layer materialsExpect that, progressively to build a three-dimensional print object, the 3D printing equipment includes：Print head 1, the second sliding equipment 3,One sliding equipment 4, silk dispenses controller 2, the first heating element 5, silk chamber 6, silk 7, nozzle 8, mixing chamber 9, substrate10, material layer 11, working face 12, motion controller 13, plate hole 14, disk rail 15, the first driving motor 16, support extension arm17, the second driving motor 18, print platform 19, circular material 20,21 print head 1 of electric rotating machine；Motion controller 13 is for controllingPrint head 1 is transferred in a scheduled workspace by the movement of print head 1 processed；Silk chamber 6, different silks 7 enter silk chamber6 dispense controller 2 by silk is pushed further into mixing chamber, and carrying out heating by heating element 5 during propulsion meltsMelt, then reach mixing chamber 9, the rabbling mechanism 23 in mixing chamber 9 is stirred by the drive of electric screw axis, is pushed away by stirringInto melting silk reach nozzle 8, the nozzle is provided with plate hole 14, and melted material passes through plate hole 14 and flows out printing port.
After the material leaves nozzle 8, the material of melting begins to cool and is solidified to again on substrate 10.Substrate 10 is oneA current print job surface, the cured material layer 11 that 10 lower layer of substrate is previously formed.It is applied to elder generation in melted materialIn the case of the material layer 11 of preceding formation, the temperature of fused materials may cause before 11 surface local melting of material layer.ThisThe fusing of kind part contributes to the combination for the material layer 11 for having solidified the material of new opplication and last layer.
One 3D printing equipment of Fig. 2 schematic diagrames description prints the schematic diagram of a hemispherical objects, and the equipment is at oneIn controllable spheric coordinate system.As shown, 3D printing equipment can create a hemispherical with continuous boundary profileObject, and this there is no apparent step edges profiles.In general, spherical shape is built when the shell by multiple radially increasesOr when hemispherical objects, this printing device may be particularly useful, for example can be used for being formed the core of spherical object.
As shown in Figure 1, the 3D printing equipment includes：First sliding equipment 4, the second sliding equipment 3, print head 1, it is describedFirst sliding equipment 4, the second sliding equipment 3 are fixed on disk rail 15, and print head 1 is slidably connected while disk rail 15 connectsThe first sliding equipment 4 is connect,.The disk rail 15 is disposed in an orbit plane orthogonal with working surface, and is hadOne constant curvature radius.
Second sliding equipment 3, including multiple wheels, bearing and sleeve assembly, it can make it successfully along trackIt is translated.Second sliding equipment can control the second sliding equipment to exist by 18 driving of the second motor driving, the second driving motor 18Position on disk rail.
The connection of the first sliding equipment 4 support extension arm 17, supports printhead support 1 in turn of extension arm 17.Pass throughThe relative position that the first driving motor 16 realizes control support adjutage 17 and the first sliding equipment 4 is controlled, to realize print headMove radially.
The motion controller 13 can carry out information mutual communication with the first driving motor 16 and the second driving motor 18, pass throughMotion controller 13 can control azimuth and the radial positioning of print head 1 respectively, and motion controller 13 can be presented as oneDigital computer or data processing equipment.
Melting charge " printing " can be arrived the hemispherical substrate 19 of bottom by a kind of 3D printing equipment shown in Fig. 2, print head 1On, it can form hemispheric material layer in print procedure, and therefore, which can print one and connect naturallyContinuous circle enormously simplifies the calculation amount generated needed for numerical control program.(the Cartesian control of the prior art must coordinate twoThe driving of different actuators generates a similar circle).
As shown in Fig. 3 printing device print head viewgraph of cross-section, in print procedure, printing silk 7 is with thermoplastic threadsForm input silk chamber 6, by continuous feeding mechanism, print head can be advanced it into.Continuous feeding mechanism is mainBy the rotating wheel on four feed controllers 2, rotating wheel controls charging rate by rotating.
As shown in figure 3, silk 7 enters the silk chamber 6 in print head 1, silk chamber 6 is added by first heating element 5Heat makes Filamentous thermoplastic melt thermoplastic by heating.First heating element 5 is located at the main part of print head 1In, thermoplastic solidifies again in nozzle 8 in order to prevent, by be arranged reheating element 22 to the material in nozzle 8 intoThe processing of row reheating, second heating element are wound around in the film resistor of nozzle wall inner surface, can reduce to the greatest extent in this wayThe wall thickness of nozzle.The reheating element 22 is relative to the heating element that the first heating element 5 is a lower-wattage, but energyEnough keep silk at thermoplastic fusing point or temperatures above.
The mixing chamber 9 promotes to mix comprising a rabbling mechanism 23, and the rabbling mechanism 23 is by helical blade, spiralAxis is constituted, and further helical axis is driven by electric rotating machine.
As shown in figure 3,8 exit tip of the nozzle is in certain taper, this angle is also referred to as flow angle 24.This gasThe angular range at angle is flowed between 75 ° to 90 °, the larger flow angle of angle is particularly suitable for being used for close to hemispherical objects, andBetween the longitudinal length of nozzle cone part is about 10 millimeters to 20 millimeters, the long condensation for being easy to cause material at nozzle.
Example the above is only the implementation of the present invention is not intended to limit the scope of the invention, every to utilize this hairEquivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skillsArt field includes similarly in the scope of patent protection that this is invented in fact.