CN103921443A - Three-dimensional (3D) printing method and 3D printing system - Google Patents
Three-dimensional (3D) printing method and 3D printing system Download PDFInfo
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- CN103921443A CN103921443A CN201410142105.0A CN201410142105A CN103921443A CN 103921443 A CN103921443 A CN 103921443A CN 201410142105 A CN201410142105 A CN 201410142105A CN 103921443 A CN103921443 A CN 103921443A
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- 238000007639 printing Methods 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000010146 3D printing Methods 0.000 title abstract description 5
- 239000010410 layer Substances 0.000 claims abstract description 20
- 230000001360 synchronised effect Effects 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 8
- 230000007423 decrease Effects 0.000 claims abstract description 4
- 230000033001 locomotion Effects 0.000 claims description 16
- 238000000465 moulding Methods 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 7
- 230000003028 elevating effect Effects 0.000 claims description 3
- 239000002356 single layer Substances 0.000 claims description 2
- 239000011229 interlayer Substances 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 241001212149 Cathetus Species 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 238000000016 photochemical curing Methods 0.000 description 1
- 239000000088 plastic resin Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000004834 spray adhesive Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Abstract
The invention discloses a three-dimensional (3D) printing method and a 3D printing system. Printing data information of an object is acquired, a printing material is controlled to be molded layer by layer according to the printing data information, and printing is realized. The 3D printing method is characterized by comprising the following steps: providing a circular printing platform for bearing a printing object; setting multiple printing heads on the circular printing platform, wherein multiple nozzles which are radially arranged along the circle are arranged on each printing head; and setting a synchronous control mechanism, and synchronously controlling the circular printing platform to rotate around a rotating shaft in the center of a circle and decline during printing, so that the molded printing layers form a spiral shape on the whole circular printing platform, and the position and shapes of slicing data of the printing data information in the object are consistent with the spiral layer shape of the printing object. Multi-layer synchronous printing in a printing period is realized, the printing speed is improved, and the interlayer binding force is enhanced.
Description
Technical field
The present invention relates to a kind of 3D printing shaping technology in kind, be specifically related to a kind of 3D Method of printing of realizing printing speed, and corresponding 3D print system.
Background technology
3D printing technique is a kind of rapid shaping technique, and it,, taking mathematical model file as basis, utilizes the material such as powdery metal, plastic resin, adopts the methods such as adhesive bond, photocuring, carrys out constructed object by the mode of successively printing.Wherein, conventional several Method of printings have: adhesion-molded to the dusty material layer spray adhesive of laying by printhead; Light-cured resin is adopted to the light-struck Stereolithography of UV; Laser sintered to metal dust; Laser sintered or thermal sintering to thermoplastic powder etc.
These methods all need to adopt printhead successively to print realization conventionally.First by microcomputer modelling software modeling, again by the threedimensional model section generating, generate cross section information successively, cross section information in printer file reading, these cross sections are printed layer by layer with the material of liquid, Powdered or sheet, between each layer cross section, be glued together in every way, form an entity.
In prior art, the cross section information that above-mentioned section generates is plane information, in same layer, printhead adopts linear scanning mode to scan whole print area, as shown in Figure 1, and printhead rectilinear motion, complete after the printing campaign of a direction, turn to outward at print area, then print adjacent region, after repeatedly turning to scanning, complete the printing in whole region.This mode is printed every one deck printhead need to repeatedly carry out flyback retrace, and scanning later accelerates and deceleration is lost time, and, for avoiding interfering between printhead motor area, minority shower nozzle can only be installed, therefore, print speed is very slow; In addition, this mode can only in layer be printed, and long in the time interval of same position place one deck from printing one deck is extremely printed, while causing adopting part molding mode, interlayer adhesion is affected.
For accelerating print speed, to the printing of spray regime, to consider to increase droplet volume and print bed thickness, result is to cause the precision of printing objects and resolution ratio to decline; And be subject to the restriction of ink droplet tranmitting frequency, be difficult to improve sweep speed.In addition, can consider that splicing multiple printheads increases the print span of single sweep operation, but still be subject to the restriction of print area width.
Another kind is considered, changes scan mode into circular scan mode, thereby make printhead with respect to print area unidirectional motion by linear scanning mode, saves printhead and turns to the acceleration in scanning process and slow down the time of wasting.This mode is helpful to the raising of print speed, and still, it is still successively molding mode of plane in essence, fail to solve long to time interval of one deck printing from printing one deck at same position place, the affected problem of interlayer adhesion.
Therefore, be necessary Method of printing to improve, change the mode of successively moulding of prior art midplane, to improve print speed and to solve interlayer adhesion problem.
Summary of the invention
Goal of the invention of the present invention is to provide a kind of 3D Method of printing, is not changing under the prerequisite of existing forming method, improves speed and the interlayer adhesion printed; Another goal of the invention of the present invention is to provide a kind of 3D print system that realizes above-mentioned Method of printing.
To achieve the above object of the invention, the technical solution used in the present invention is: a kind of 3D Method of printing, obtain the print data information of object, according to the successively moulding of described print data information control printed material, realize and printing, provide a circular print platform for carrying printing objects, described circular print platform has driving print platform around the rotary drive mechanism of center of circle rotating shaft rotation and drives print platform along the lift drive mechanism that is parallel to the lifting of rotating shaft direction; Above described circular print platform, be provided with multiple printheads, each printhead is provided with the multiple shower nozzles along circular radial arrangement; One synchronizing control is set, and when printing, rotary drive mechanism rotates described in described synchronizing control control, and controls lift drive mechanism and synchronously decline, and makes the printable layer of moulding form helical form on whole circular print platform; The position of the slice of data of described print data information in object is consistent with the spiral stratiform of printing objects with shape.
In technique scheme, the method for controlling printed material moulding is prior art, for example, adopts powder bed powder in conjunction with binding agent injection molding, and the shower nozzle in printhead is ink jet-print head; Adopt Laser Focusing curing molding, the each shower nozzle in printhead is a laser emitting head.According to rotation and the synchrodrive system of lifting, and the location of printout, can learn particular location and the shape of spiral stratiform, from the 3D data file of object, obtain corresponding print data thus.Due to the position distribution of printhead and the continuous rotation of circular print platform, multiple printheads can be printed corresponding region separately simultaneously, same printing objects passes through successively different printheads in rotation process, one deck above of the previous printhead prints layer of the next corresponding printing of printhead, thus, circular print platform rotates a circle, can realize multilayer and print, thereby accelerate print speed.
Preferred technical scheme, be provided with N printhead, N is 2～10 integer, the relatively circular print platform of each printhead is circumferentially evenly arranged, the thickness in monolayer of each printhead prints is t, in the time that the anglec of rotation of circular print platform is θ, the synchronization lifting height of print platform is h, when Synchronization Control, meets h=N × t × θ/360.
Described synchronizing control is synchronized with the movement described rotary drive mechanism and lift drive mechanism according to control instruction, or Asynchrony; In the time printing end, synchronizing control is controlled separately lift drive mechanism motion, makes printhead away from circular print platform.Thereby facilitate print head cleaning and sealing.
For realizing above-mentioned Method of printing, the invention provides a kind of 3D print system, comprising:
One circular print platform, described circular print platform has the rotary drive mechanism that drives print platform to rotate around center of circle rotating shaft and the lift drive mechanism that drives print platform along the lifting of rotating shaft parallel direction;
Multiple printheads, described printhead is arranged on described circular print platform top, and each printhead is provided with the multiple shower nozzles along circular radial arrangement;
One synchronizing control, connects and controls described rotary drive mechanism and lift drive mechanism.
Preferred technical scheme, described synchronizing control is electronic control system, described print system comprises the encoder being connected with circular print platform, and this electronic control system is according to electronic pulse signal lift drive mechanism that Synchronization Control the is told motion of the encoder output being connected with circular print platform.This electronic control system also can make described rotary drive mechanism and lift drive mechanism be synchronized with the movement as required, or Asynchrony.In the time printing end, can control separately lift drive mechanism motion, make printhead away from circular print platform, facilitate print head cleaning and sealing.
In technique scheme, be provided with 2～10 printheads, the relatively circular print platform of each printhead is circumferentially evenly arranged.
Further technical scheme, described circular print platform is fixedly connected with a central branches strut, and described rotary drive mechanism drives and connects described central branches strut; Described lift drive mechanism drives and connects described central branches strut.
Or described circular print platform is fixedly connected with a central branches strut, described rotary drive mechanism drives and connects described central branches strut; Described circular print platform slid underneath is connected with a rotational slide mechanism, and described lift drive mechanism drives circular print platform lifting through described rotational slide mechanism.
Wherein, described rotational slide mechanism is by forming with the gripper shoe contacting with the basal sliding of ring-type slide mechanism with the ring-type slide mechanism of circular print platform bottom surface sliding-contact, and described lift drive mechanism is connected with described gripper shoe.
Further technical scheme, contact and be provided with annular limited wall with described circular print platform periphery, described limited wall exceeds between the part of circular print platform and the upper surface of circular print platform and forms powder bed, the rotary freedom of described circular print platform and limited wall locks mutually, rotary drive mechanism connects central branches strut and limited wall, drives and controls circular print platform and limited wall synchronous rotary; Described lift drive mechanism connects described central branches strut, drives the circular print platform of control edge in limited wall to be parallel to the elevating movement of rotating shaft direction.
Because technique scheme is used, the present invention compared with prior art has following advantages:
1, the present invention is by arranging circular print platform, utilize being synchronized with the movement of rotary drive mechanism and lift drive mechanism, realized spiral printable layer, compared with successively printing with existing plane layer, can realize multilayer in a printing interval and print simultaneously, thereby improve print speed.
2, because multilayer in a printing interval is printed simultaneously, interlayer printing gap is shortened, be conducive to adhesion between enhancement layer.
3, the present invention, by an independently synchronizing control is set, has realized the flexible control to rotary drive mechanism and lift drive mechanism; When printing, control both and be synchronized with the movement; In the time printing end, can control separately lift drive mechanism motion, make printhead away from circular print platform, facilitate print head cleaning and sealing.
Brief description of the drawings
Fig. 1 is the schematic diagram of prior art cathetus scanning form;
Fig. 2 is the structural representation of the embodiment of the present invention one;
Fig. 3 is that the printhead in the embodiment of the present invention one is arranged schematic diagram;
Fig. 4 is the structural representation of the embodiment of the present invention two;
Fig. 5 is the structural representation of the embodiment of the present invention three;
Fig. 6 is the structural representation of the embodiment of the present invention four;
Fig. 7 is the structural representation of the embodiment of the present invention five.
Wherein: 1, printhead; 2, printing objects; 3, circular print platform; 4, central branches strut; 5, rotary drive mechanism; 6, lift drive mechanism; 7, rotational slide mechanism; 8, ring-type slide mechanism; 9, gripper shoe; 10, limited wall; 11, powder bed.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described:
Embodiment mono-: shown in Figure 2, a kind of 3D print system, comprise a circular print platform 3, described circular print platform 3 is fixedly connected with a central branches strut 4, be provided with rotary drive mechanism 5 and lift drive mechanism 6, described rotary drive mechanism 5 drives and connects described central branches strut 4, thereby circular print platform 3 is rotated around center of circle rotating shaft, described lift drive mechanism 6 drives and connects described central branches strut 4, thereby makes circular print platform along being parallel to the lifting of rotating shaft direction; Be provided with a synchronizing control, connect and control described rotary drive mechanism 5 and lift drive mechanism 6.
In the present embodiment, rotary drive mechanism 5 can adopt any existing techniques in realizing, and for example, gear drive, toothed belt transmission, motor shaft directly drag etc., in order to realize Synchronization Control, should select controlled rotating drive mode.
Lift drive mechanism 6 also can adopt any existing techniques in realizing, and for example, screw thread transmission, rack-and-pinion transmission, worm-drive etc., similarly, in order to realize Synchronization Control, should select controlled rotating drive mode.
In the present embodiment, above described circular print platform, be provided with multiple printheads, each printhead is provided with the multiple shower nozzles along circular radial arrangement.Preferably design is, the relatively circular print platform of each printhead is circumferentially evenly arranged.As shown in Figure 3, be provided with 6 printheads.
While adopting the device printing of the present embodiment, first obtain the print data information of object, determine the structure of helical form printable layer according to the rotation of circular print platform and lifting information, thereby obtain the slice of data of respective layer, control accordingly successively moulding of printed material, realize and printing.While being provided with 6 printheads, print platform as relatively circular in each printhead is circumferentially evenly arranged, and the individual layer print thickness of each printhead is t, and in the time that the anglec of rotation of circular print platform is θ, print platform synchronization lifting height is h, when Synchronization Control, meet h=6 × t × θ/360.According to reality print situation, can to circular print platform different radii and shower nozzle do compensation calculate, adopt different injection rates.
Embodiment bis-: shown in Figure 4, a kind of 3D print system, basic structure is identical with embodiment mono-, and in the present embodiment, rotary drive mechanism 5 and lift drive mechanism 6 are integrated, are realized by a set of driving mechanism.
Embodiment tri-: shown in Figure 5, a kind of 3D print system, basic structure is identical with embodiment mono-, and difference is, and described circular print platform is fixedly connected with a central branches strut 4, and described rotary drive mechanism 5 drives and connects described central branches strut 4; Described circular print platform slid underneath is connected with a rotational slide mechanism 7, and described lift drive mechanism 6 drives circular print platform 3 liftings through described rotational slide mechanism 7.
Embodiment tetra-: shown in Figure 6, a kind of 3D print system, basic structure is identical with embodiment mono-, and difference is, and described circular print platform is fixedly connected with a central branches strut 4, and described rotary drive mechanism 5 drives and connects described central branches strut 4; Described circular print platform slid underneath is connected with a rotational slide mechanism, described rotational slide mechanism is by forming with the gripper shoe 9 contacting with 8 basal slidings of ring-type slide mechanism with the ring-type slide mechanism 8 of circular print platform 3 bottom surface sliding-contacts, described lift drive mechanism 6 is connected with described gripper shoe 9, and realizes the control of the lifting to circular print platform 3 by controlling the lifting of gripper shoe 9.
Embodiment five: shown in Figure 7, a kind of 3D print system, basic structure is identical with embodiment mono-, difference is, contact and be provided with annular limited wall 10 with described circular print platform 3 peripheries, described limited wall 10 exceeds between the part of circular print platform 3 and the upper surface of circular print platform 3 and forms powder bed 11, described circular print platform 3 locks mutually with the rotary freedom of limited wall 10, rotary drive mechanism 5 connects central branches strut 4 and limited wall 10, drives and controls circular print platform 3 and limited wall 10 synchronous rotaries; Described lift drive mechanism 6 connects described central branches strut 4, drives the circular print platform 3 of control interior along the elevating movement of rotating shaft parallel direction at limited wall 10.
Claims (10)
1. a 3D Method of printing, obtain the print data information of object, according to the successively moulding of described print data information control printed material, realize and printing, it is characterized in that: provide a circular print platform for carrying printing objects, described circular print platform has driving print platform around the rotary drive mechanism of center of circle rotating shaft rotation and drives print platform along the lift drive mechanism that is parallel to the lifting of rotating shaft direction; Above described circular print platform, be provided with multiple printheads, each printhead is provided with the multiple shower nozzles along circular radial arrangement; One synchronizing control is set, and when printing, rotary drive mechanism rotates described in described synchronizing control control, and controls lift drive mechanism and synchronously decline, and makes the printable layer of moulding form helical form on whole circular print platform; The position of the slice of data of described print data information in object is consistent with the spiral stratiform of printing objects with shape.
2. 3D Method of printing according to claim 1, it is characterized in that: be provided with N printhead, N is 2～10 integer, the relatively circular print platform of each printhead is circumferentially evenly arranged, the thickness in monolayer of each printhead prints is t, in the time that the anglec of rotation of circular print platform is θ, print platform synchronization lifting height is h, when Synchronization Control, meets h=N × t × θ/360.
3. 3D Method of printing according to claim 1, is characterized in that: described synchronizing control is synchronized with the movement described rotary drive mechanism and lift drive mechanism according to control instruction, or Asynchrony; In the time printing end, synchronizing control is controlled separately lift drive mechanism motion, makes printhead away from circular print platform.
4. a 3D print system, is characterized in that, comprising:
One circular print platform (3), described circular print platform (3) has driving print platform around the rotary drive mechanism (5) of center of circle rotating shaft rotation and drives print platform along the lift drive mechanism (6) that is parallel to the lifting of rotating shaft direction;
Multiple printheads (1), described printhead (1) is arranged on described circular print platform (3) top, and each printhead (1) is provided with the multiple shower nozzles along circular radial arrangement;
One synchronizing control, connects and controls described rotary drive mechanism (5) and lift drive mechanism (6).
5. 3D print system according to claim 4, is characterized in that: be provided with 2～10 printheads, the relatively circular print platform of each printhead is circumferentially evenly arranged.
6. 3D print system according to claim 4, it is characterized in that: described circular print platform (3) is fixedly connected with a central branches strut (4), described rotary drive mechanism (5) drives and connects described central branches strut (4); Described lift drive mechanism (6) drives and connects described central branches strut (4).
7. 3D print system according to claim 4, it is characterized in that: described circular print platform (3) is fixedly connected with a central branches strut, described rotary drive mechanism (5) drives and connects described central branches strut (4); Described circular print platform slid underneath is connected with a rotational slide mechanism (7), and described lift drive mechanism (6) drives circular print platform lifting through described rotational slide mechanism (7).
8. 3D print system according to claim 7, it is characterized in that: described rotational slide mechanism (7) is by forming with the gripper shoe (9) contacting with ring-type slide mechanism (8) basal sliding with the ring-type slide mechanism (8) of circular print platform (3) bottom surface sliding-contact, and described lift drive mechanism (6) is connected with described gripper shoe (9).
9. 3D print system according to claim 4, it is characterized in that: contact and be provided with annular limited wall (10) with described circular print platform (3) periphery, described limited wall (10) exceeds between the part of circular print platform (3) and the upper surface of circular print platform (3) and forms powder bed (11), described circular print platform (3) locks mutually with the rotary freedom of limited wall (10), rotary drive mechanism (5) connects central branches strut (4) and limited wall (10), drive and control circular print platform (3) and limited wall (10) synchronous rotary, described lift drive mechanism (6) connects described central branches strut (4), drives the circular print platform of control (3) edge in limited wall (10) to be parallel to the elevating movement of rotating shaft direction.
10. 3D print system according to claim 4, described synchronizing control is electronic control system, described print system comprises the encoder being connected with circular print platform, and this electronic control system is according to lift drive mechanism motion described in the electronic pulse signal Synchronization Control of the encoder output being connected with circular print platform.
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| CN201410142105.0A CN103921443B (en) | 2014-04-10 | 2014-04-10 | Three-dimensional (3D) printing method and 3D printing system |
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