CN105437548A - 3D printing equipment - Google Patents
3D printing equipment Download PDFInfo
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- CN105437548A CN105437548A CN201510940805.9A CN201510940805A CN105437548A CN 105437548 A CN105437548 A CN 105437548A CN 201510940805 A CN201510940805 A CN 201510940805A CN 105437548 A CN105437548 A CN 105437548A
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- printing
- printhead
- tapping channel
- pigment
- stack shell
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
- B29K2995/002—Coloured
Abstract
The invention discloses 3D printing equipment. The 3D printing equipment comprises a main frame, a discharge printing head and a molding printing table, and further comprises a printing head displacement adjusting mechanism for driving the discharge printing head to move so as to change the position of the discharge printing head; a printing head feed end for inputting a printing raw material is arranged on the discharge printing head; and a discharge channel communicated with the printing head feed end is arranged in the discharge printing head. The 3D printing equipment further comprises a pigment barrel and a conveying pump; an inlet of the conveying pump is communicated with the pigment barrel; and an outlet of the conveying pump is communicated with a discharge channel. The 3D printing equipment has the beneficial effects of capability of quickly and effectively realizing coloring of the printing raw material, short used time, fast coloring, saving of used pigment, difficult waste, capability of guaranteeing the coloring effect and the final printing material quality under the precondition of saving the pigment and capability of preventing head blockage.
Description
Technical field
The invention belongs to 3D printing technique field, particularly relate to a kind of 3D printing device.
Background technology
3D printer, also known as three-dimensional printer (3DP), is utilize accumulation manufacturing technology, i.e. a kind of machine of RP technique.3D printing technique is based on a kind of mathematical model file, uses molten plastic etc. can jointing material, manufactures three-dimensional object by the jointing material printed from level to level, also namely carrys out the technology of constructed object with successively printing type.Present stage 3D printer is used to manufacture a product more.
3D printer mainly comprises print structure (printhead), shaping stamp pad (product is shaping) and printhead displacement governor motion thereon (spatially can change the position of printhead, make the raw material printed can drop on diverse location above shaping stamp pad, three-dimensionally shaped to realize product).During 3D printing device printed product, often have the demand of different colours, adopt the printing raw material of different colours sometimes, sometimes then can carry out painted (when especially all kinds of molten plastic is as raw material) printing raw material.At present when carrying out painted to printing raw material, adopting allows raw material (molten condition) and pigment (colouring matter) carry out the mode mixed in advance, relatively expend time in, and mix the use at once of painted rear needs, otherwise easily there is pigment and raw material layering, the overall problem such as uneven, the colouring material do not used also can be wasted, and can cause pigment content ratio in raw material higher (pigment does not reach the coloring degree of demand less), causes final printing to expect intensity, hydraulic performance decline.In addition, when there being colour changing demand, (when replacing heterochromatic raw material) also needs the colouring material first will stayed in original print head to remove, otherwise will cause continuing to print the printing raw material that a section is gone up a kind of color.
Summary of the invention
The present invention is to overcome deficiency of the prior art, provides a kind of rational in infrastructure, and can fast and effeciently realize printing the painted, time-consuming short, soon painted of raw material, amount of pigment is saved, not easily wasted, and smoothly, the 3D printing device of efficient colour changing.
To achieve these goals, the present invention is by the following technical solutions:
A kind of 3D printing device, comprise mainframe, discharging printhead, shaping stamp pad, also comprise one for driving discharging printhead to move thus changing the printhead displacement governor motion of discharging print head position, described discharging printhead is provided with for inputting the printhead feed end printing raw material, the tapping channel be communicated with printhead feed end is provided with in described discharging printhead, also comprise pigment bucket, delivery pump, delivery pump inlet communication pigment bucket, delivery pump outlet tapping channel.Discharging printhead prints raw material (as molten plastic) to shaping stamp pad for exporting, printhead displacement governor motion is for regulating relative position between discharging printhead and shaping stamp pad (discharging printhead discharging direction all the time down, change is horizontal level and height).Pigment (i.e. dye, colouring matter) in pigment cylinder is transported to tapping channel by delivery pump, thus can carry out painted to printing raw material in tapping channel, printing raw material after painted is discharged from tapping channel lower end, curing molding (have discharge pressure during pigment conveying, there will not be and print the problem of feed stream to pigment transfer passage).This coloring mode, can as current additive color mode, first carry out printing raw material to be in harmonious proportion with mixing of pigment, print after raw material and pigment is in harmonious proportion so avoid, in mixed material (with pigment) reservoir vessel, easily there is deposition layering (pigment and print raw material heavily heavy frivolous), and the problem of follow-up mixed material lack of homogeneity when printing caused.And just need when printing to input pigment, when not printing, pigment is without the need to supply, not easily causes waste.And, 3D prints raw material and not necessarily is fused raw material (molten plastic etc.), also can be solid bar material (solid bar material after entering tapping channel just by heating arrangement heating and melting), the coloring mode of this programme just also can meet such and print the painted of raw material.In addition, when colour changing, as long as directly cut off the feed (pigment) of delivery pump, the printing raw material that can not retain a kind of color in discharging printhead is (painted very continuous with printing discharging, there will not be the situation that a large amount of painted printing raw material retains, because firm painted complete, have printed with regard to discharging, the situation that pigment remains not easily occurs).
As preferably, described delivery pump outlet is communicated with tapping channel by coloring structure, coloring structure comprises additive color endless tube, many of being located on additive color endless tube colour tube, additive color endless tube is coaxial with tapping channel, colour tube inlet communication additive color endless tube, colour tube outlet tapping channel, each colour tube is uniformly distributed along tapping channel circumference, and described additive color endless tube is communicated to delivery pump outlet by pigment transfer pipeline.By many colour tube week evenly sends into pigment outside, be beneficial to and promote painted uniformity and efficiency.
As preferably, described tapping channel is vertical and cylindrical, discharging printhead is located on a printing caster bed frame, described printhead displacement governor motion is a parallel institution, parallel institution comprises three side chains in parallel, and side chain in parallel comprises two adjusting rods, a band motion block moving up and down, the band motion block in same side chain in parallel and globular hinge between adjusting rod upper end, globular hinge between each adjusting rod lower end and printhead stand, three side chains in parallel are uniformly distributed along the circumference of tapping channel." globular hinge ", also makes " ball-type is hinged ", " ball pivot ".This programme gives the form of a 3-freedom parallel mechanism, by moving up and down of each band motion block, thus make the angle of each adjusting rod and highly change, carry out the movement in horizontal direction and the movement in short transverse to drive printhead stand and discharging printhead.
As preferably, described side chain in parallel also comprises side chain motor, vertical guide bar, transmission mechanism, and transmission mechanism comprises driving wheel, driven pulley, walks around the driving belt of driving wheel and driven pulley, and driving belt first place is closed, in same side chain in parallel:
The rotational power of driving wheel is from side chain motor, be slidably connected between band motion block and vertical guide bar, slidably direction with motion block is vertical, band motion block is provided with determines hole, hole alive, determine hole, Kong Jun alive runs through the band upper and lower surface of motion block, driving belt is through determining hole, hole alive, and driving belt is in the part of determining in hole and is fixedly connected with between band motion block.Side chain motor drives driving belt to rotate by driving wheel, and driven pulley plays location and coordinates the effect of tensioning driving belt.Driving belt can move up and down with band motion block, and band motion block is when moving up and down, and driving belt is in that to determine relative position between part in hole and band motion block constant all the time, and driving belt is between part in hole alive and band motion block then has relative movement.
As preferably, the heat insulation cylinder coaxial with tapping channel is provided with in described tapping channel, the equal opening of heat insulation cylinder upper and lower end, heat insulation cylinder is connected with discharging printhead by connecting rod, form thin material between heat insulation cylinder lateral wall and the conduit wall of tapping channel and chrominance channel, colour tube outlet towards heat insulation cylinder lateral wall, colour tube exit and be provided with painted check valve.Time painted, at least will ensureing finally to print material (material from printhead is shaped to shaping stamp pad Post RDBMS) outer surface, fully painted (the final material inside that prints also has allowed some pigment, but it is more few better, inner pigment content is higher, more final intensity and the overall structure stability printing material of impact, also more takes pigment).Directly pigment is inputted the coloring mode of tapping channel, although advantage is a lot, but easily consume relatively many pigment, this is because, pigment is entering tapping channel, after touching the fused raw material of relatively-high temperature, easily be mixed in fused raw material, if amount of pigment is insufficient, there will be final printing and expect that surface colour is incomplete, the problem of coloring degree deficiency, and in order to ensure that final printing expects that surface colour is abundant, just have to input again relatively many pigment, so, the final inner pigment that is mixed into of material or a lot of of printing, above-mentioned final intensity and the poor deficiency of overall load ability printing material can be there is.Moreover pigment prints raw material relatively, viscosity is large, poor fluidity, be subject to thermojunction block, even zoom, in tapping channel time amount of pigment large (content ratio is high), very easily causes the blocking of discharging printhead.And in this programme, have employed heat insulation cylinder structure, after the printing raw material of melting in tapping channel flow to heat insulation cylinder place from the top down, inside and outside two parts are temporarily divided into by heat insulation cylinder, relatively high temperature still possessed by heat insulation cylinder house print raw material, normally flow down from heat insulation cylinder inside, printing raw material in heat insulation cylinder outside is in thin material and in chrominance channel, relative thickness is thinner, and can be fast, constantly touch the pigment of input, (thin material in chrominance channel that to print raw thickness thin to start fully mixing, easily be combined fully with pigment), and this part prints raw material can lower the temperature (preferably control a little more than in the temperature values of solidification temperature), painted, leave when contacting with the raw material of other relatively-high temperature (the printing raw material from heat insulation cylinder inside flows down) after chrominance channel by thin material, first raw material in outer layered material (pigment adds raw material) can absorb heat intensification, instead of allow pigment be heated separately intensification (do not have during heat insulation cylinder be exactly pigment be heated separately intensification), be equivalent to external layer pigment and serve an of short duration protective effect, and in this of short duration guard time, overall raw material has left discharging printhead to start to print, solidification, thus can ensure outer fully painted, coloring degree is high and stable.In addition, heat insulation cylinder yet forms both a barrier structure, when pigment enters tapping channel, there is certain impulsive force (it is need pressure that pigment is sent into), if directly painted, pigment is more easily mixed into and prints raw material inside, and had heat insulation cylinder, can ensure that pigment only can full and uniform in chrominance channel scattering at thin material, and carry out painted to the printing raw material that thin material in chrominance channel, fully save pigment, it also avoid final printing and expect that inner pigment content is too high.
As preferably, described discharging printhead is provided with can the METAL HEATING PROCESS block of electrified regulation, and a part for METAL HEATING PROCESS block stretches in tapping channel.This programme is applicable to solid material, and solid material enters by heating and melting after tapping channel, and then prints discharging, curing molding.This programme is also applicable to the form of post bake, namely in order to avoid fused raw material enter tapping channel after temperature drop too fast, utilize METAL HEATING PROCESS block secondary heating.
As preferably, described printhead feed end is switched to the mixing discharge end of a mixing drum by a feeding engine, mixing drum is provided with a charging aperture, also comprise some for the material tube to cylinder charging aperture feed, melting heater is provided with in material tube, mixing discharge end is provided with outlet valve, and be provided with the mixing axle driven by hybrid electric motor in described mixing drum, described mixing axle is provided with some agitation blades.When adopting the direct charging of fused raw material, fused raw material, except single material, also can be compound, each solid-state single raw material melting or thawing in material tube, enter mixing drum, now mix axle and agitation blades just can be driven to stir, promote the uniformity of compound.
As preferably, described mixing drum cylindrically, mixing drum comprises stack shell, the cylinder end, cylinder top, cylinder charging aperture is located at cylinder top, mixing drum is located in a fixing tub, mixing drum and fixing tub are rotationally connected, the center of rotation of mixing drum is stack shell axis, also comprise a mair motor for driving stack shell to rotate around stack shell axis, mixing discharge end be one with the drainage conduit of fixing at the bottom of cylinder and the blow-off valve be located in drainage conduit, drainage conduit, mixing drum, mixing axle is all coaxial, feeding engine is connected by material receiving tube and drainage conduit, drainage conduit and material receiving tube are rotationally connected, material receiving tube is fixed in fixing tub, at least four blocks of arc plates are provided with in stack shell, arc plate outer surface can be fitted with stack shell interior sidewall surface, each arc plate is uniformly distributed along the circumference of mixing axle, space between adjacent arcs plate is side material passing passage, arc plate is provided with some sideslip bars, sideslip bar passes stack shell sidewall and is connected with stack shell side walls, sideslip bar outer end is in outside stack shell, sideslip bar outer end is provided with pressing plate, pressing plate is provided with balancing weight, some returning springs are provided with between pressing plate and stack shell, returning spring one end connects pressing plate, the returning spring other end connects stack shell outer side surface.Fixing tub maintains static, and stack shell can rotate, and mixing axle also can rotate, and certainly, in practical operation, preferably allows stack shell and mixing axle reversely rotate, if rotating Vortex, then velocity of rotation otherwise with, otherwise just become " geo-stationary ".We know, the cylindrical container of this class of mixing drum, in the process of carrying out batch mixing, the material of adherent (sidewall) is not easy to be stirred, and (in reality, stirring structure is difficult to accomplish adherent first, scrape the negative effect such as wall, aggravation vibrations because have, and the accuracy of manufacture requires too high; Have centrifugal action when second stirring, in compound, comparatively large, that viscosity the is higher material of quality is easily adherent, so the uniformity of compound still can be limited).Moreover, easily there is the problem such as lower leaf and heavy burder precipitation, be also unfavorable for the uniformity ensureing compound.And in this programme, there is arc plate structure, arc plate outer surface can be fitted with stack shell interior sidewall surface, under off working state, has surplus between arc plate and stack shell interior sidewall surface, and now returning spring is not also stretched.When operating (during stirring), mair motor drives stack shell to rotate, along with stack shell rotating speed promotes, under the influence of centrifugal force, the outside displacement of balancing weight becomes large (now returning spring elongation), drive arc plate near and is labelled to stack shell interior sidewall surface gradually, thus the compound at adherent place is upper and lower to arc plate, both sides can to extrude, come back to stack shell center.And again interior mobile to arc plate, only need mair motor to stop, or speed governing (reduction of speed), so under the return action of returning spring, arc plate will move inward.And in actual whipping process, agitation blades is stirred always, under the effect of agitation blades, internal mix material outwards moves (towards stack shell sidewall), and mair motor can accelerate through several times, slow down, or several times start, stop, when starting or after accelerating, arc plate promotes the compound at adherent place on arc plate, under, both sides are extruded, the compound upwards extruded is equivalent to move from the bottom to top, achieve the effect of will a part of bottom compound turn over, solve the problem of lower leaf and heavy burder precipitation on compound in passing, and the compound extruded to both sides, remaining adherent compound can be impacted (time as adherent in arc plate, adherent compound in Nei Ji side, space material passing passage between adjacent arcs plate, adherent compound is allowed again to be mixed into stack shell center, re-start stirring, therefore can ensure that compound has high uniformity.Compound after having stirred can input tapping channel and printing shaping immediately, and therefore the final quality printing material have also been obtained guarantee.
The invention has the beneficial effects as follows: rational in infrastructure, can fast and effeciently realize printing the painted, time-consuming short, soon painted of raw material, amount of pigment is saved, is not easily wasted; Coloring effect and the final quality printing material can be ensured under the prerequisite of saving pigment, and can plug be avoided; Have comprehensive batch mixing structure, when using compound to print, can eliminate problem that is mix layered, that deposit, make the compound that prints evenly, the quality of final products is high.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is top view of the present invention;
Fig. 3 is the structural representation at the present invention one band motion block place;
Fig. 4 is a horizontal sectional drawing of band motion block of the present invention;
Fig. 5 is the structural representation at discharging printhead place in the embodiment of the present invention 1;
Fig. 6 is the structural representation at additive color endless tube place in the embodiment of the present invention 1;
Fig. 7 is the internal structure schematic diagram of discharging printhead in the embodiment of the present invention 2;
Fig. 8 is the structural representation at discharging printhead place in the embodiment of the present invention 3;
Fig. 9 is the structural representation at mixing drum place in the embodiment of the present invention 4;
Figure 10 is the enlarged drawing at a pressing plate place in Fig. 9.
In figure: mainframe 1, discharging printhead 2, tapping channel 21, printhead stand 22, heat insulation cylinder 23, chrominance channel 24 by thin material, METAL HEATING PROCESS block 25, shaping stamp pad 3, adjusting rod 41, band motion block 42, hole 421 alive, vertical guide bar 43, driving belt 44, additive color endless tube 51, colour tube 52, painted check valve 521, pigment transfer pipeline 53, mixing drum 6, hybrid electric motor 61, mixing axle 61a, agitation blades 61b, mixing reductor 61c, stack shell 611, the cylinder end 612, cylinder top 613, fixing tub 62, mair motor 63, main gear reducer 63a, driving pulley 63b, annular driven belt wheel 63c, power belt 63d, drainage conduit 64, material receiving tube 65, arc plate 66, sideslip bar 661, pressing plate 662, balancing weight 663, returning spring 664, airtight and watertight padding block 665.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
Embodiment 1: in embodiment as shown in Figures 1 to 6, a kind of 3D printing device, comprise mainframe 1, discharging printhead 2, shaping stamp pad 3, also comprise one for driving discharging printhead to move thus changing the printhead displacement governor motion of discharging print head position, described discharging printhead is provided with for inputting the printhead feed end printing raw material, the tapping channel 21 be communicated with printhead feed end is provided with in described discharging printhead, also comprise pigment bucket, delivery pump, delivery pump inlet communication pigment bucket, delivery pump outlet tapping channel.Discharging printhead prints raw material (as molten plastic) to shaping stamp pad for exporting, printhead displacement governor motion is for regulating relative position between discharging printhead and shaping stamp pad (discharging printhead discharging direction all the time down, change is horizontal level and height).Pigment (i.e. dye, colouring matter) in pigment cylinder is transported to tapping channel by delivery pump, thus can carry out painted to printing raw material in tapping channel.This coloring mode, can as current additive color mode, first carry out printing raw material to be in harmonious proportion with mixing of pigment, print after raw material and pigment is in harmonious proportion so avoid, in mixed material (with pigment) reservoir vessel, easily there is deposition layering (pigment and print raw material heavily heavy frivolous), and the problem of follow-up mixed material lack of homogeneity when printing caused.And, 3D prints raw material and not necessarily is fused raw material (molten plastic etc.), also can be solid bar material (solid bar material after entering tapping channel just by heating arrangement heating and melting), the coloring mode of this programme just also can meet such and print the painted of raw material.
Described delivery pump outlet is communicated with tapping channel by coloring structure, coloring structure comprises additive color endless tube 51, many of being located on additive color endless tube colour tube 52, additive color endless tube is coaxial with tapping channel, colour tube inlet communication additive color endless tube, colour tube outlet tapping channel, each colour tube is uniformly distributed along tapping channel circumference, and described additive color endless tube is communicated to delivery pump outlet by pigment transfer pipeline 53.Delivery pump import also can be communicated with pigment bucket by another pigment transfer pipeline, and delivery pump can select all kinds of screw pumps etc.By many colour tube week evenly sends into pigment outside, be beneficial to and promote painted uniformity and efficiency.
Described tapping channel is vertical and cylindrical, discharging printhead is located on a printing caster bed frame 22, described printhead displacement governor motion is a parallel institution, parallel institution comprises three side chains in parallel, side chain in parallel comprises two adjusting rods, 41, band motion block 42 moving up and down, band motion block in same side chain in parallel and globular hinge between adjusting rod upper end, globular hinge between each adjusting rod lower end and printhead stand, three side chains in parallel are uniformly distributed along the circumference of tapping channel.In same side chain in parallel: two adjusting rods are to be with motion block for reference to being symmetrical arranged mutually." globular hinge ", also make " ball-type is hinged ", " ball pivot ", " globular hinge " fit structure comprises the flexural pivot and hinged ball of working in coordination, and hinged ball can directly be fixed structurally, also can be fixing structurally by bulb fixed bar.This programme gives the form of a 3-freedom parallel mechanism, by moving up and down of each band motion block, thus make the angle of each adjusting rod and highly change, the movement in horizontal direction and the movement in short transverse (when moving up and down together with three band motion blocks, the movement that discharging printhead carries out in short transverse can be driven) is carried out to drive printhead stand and discharging printhead.Certainly, printhead displacement governor motion is not limited to one, three-axis reference displacement governor motion conventional in current 3D printing field, or other is for the displacement governor motion driving discharging printhead to carry out moving horizontally and highly to regulate, and all can adopt.
Described side chain in parallel also comprises side chain motor, vertical guide bar 43, transmission mechanism, and transmission mechanism comprises driving wheel, driven pulley, walks around the driving belt 44 of driving wheel and driven pulley, and driving belt first place is closed, in same side chain in parallel:
The rotational power of driving wheel is from side chain motor, be slidably connected between band motion block and vertical guide bar, slidably direction with motion block is vertical, band motion block is provided with determines hole, hole 421 alive, determine hole, Kong Jun alive runs through the band upper and lower surface of motion block, driving belt is through determining hole, hole alive, and driving belt is in the part of determining in hole and is fixedly connected with between band motion block.The part that driving belt is in hole alive can move up and down relatively with between band motion block.Side chain motor drives driving belt to rotate by driving wheel, and driven pulley plays location and coordinates the effect of tensioning driving belt.Driving belt can move up and down with band motion block, when band motion block moves up and down, driving belt be in determine part in hole and between band motion block relative position constant all the time, driving belt is in part in hole alive and then has relative movement (relative move up and down) between band motion block, and wherein side chain motor can be servomotor.In same side chain in parallel: the output of side chain motor connects the input of a side chain reductor, and the output of side chain reductor is coaxially connected with driving wheel.
Embodiment 2: the basic structure of the present embodiment and embodiment are with embodiment 1, and its difference is:
As shown in Figure 7, the heat insulation cylinder 23 coaxial with tapping channel is provided with in described tapping channel, the equal opening of heat insulation cylinder upper and lower end, heat insulation cylinder is connected with discharging printhead by connecting rod, form thin material between the conduit wall (being also discharging printhead madial wall) of heat insulation cylinder lateral wall and tapping channel and chrominance channel 24, colour tube outlet towards heat insulation cylinder lateral wall, colour tube exit and be provided with painted check valve 521.Painted check valve by direction be colour tube to tapping channel, painted mouth peak is lower than heat insulation cylinder peak, painted mouth minimum point is higher than heat insulation cylinder minimum point.The vertical spacing of heat insulation cylinder lower end and discharging printhead lower end is 5 to 15mm.Time painted, at least will ensureing finally to print material (material from printhead is shaped to shaping stamp pad Post RDBMS) outer surface, fully painted (the final material inside that prints also has allowed some pigment, but it is more few better, inner pigment content is higher, more final intensity and the overall structure stability printing material of impact, also more takes pigment).Directly pigment is inputted the coloring mode of tapping channel, although advantage is a lot, but easily consume relatively many pigment, this is because, pigment is entering tapping channel, after touching the fused raw material of relatively-high temperature, easily be mixed in fused raw material, if amount of pigment is insufficient, there will be final printing and expect that surface colour is incomplete, the problem of coloring degree deficiency, and in order to ensure that final printing expects that surface colour is abundant, just have to input again relatively many pigment, so, the final inner pigment that is mixed into of material or a lot of of printing, above-mentioned final intensity and the poor deficiency of overall load ability printing material can be there is.Moreover pigment prints raw material relatively, viscosity is large, poor fluidity, be subject to thermojunction block, even zoom, in tapping channel time amount of pigment large (content ratio is high), very easily causes the blocking of discharging printhead.And in this programme, have employed heat insulation cylinder structure, after the printing raw material of melting in tapping channel flow to heat insulation cylinder place from the top down, inside and outside two parts are temporarily divided into by heat insulation cylinder, relatively high temperature still possessed by heat insulation cylinder house print raw material, normally flow down from heat insulation cylinder inside, printing raw material in heat insulation cylinder outside is in thin material and in chrominance channel, relative thickness is thinner, and can be fast, constantly touch the pigment of input, (thin material in chrominance channel that to print raw thickness thin to start fully mixing, easily be combined fully with pigment), and this part prints raw material can lower the temperature (preferably control a little more than in the temperature values of solidification temperature), painted, leave when contacting with the raw material of other relatively-high temperature (the printing raw material from heat insulation cylinder inside flows down) after chrominance channel by thin material, first raw material in outer layered material (pigment adds raw material) can absorb heat intensification, instead of allow pigment be heated separately intensification (do not have during heat insulation cylinder be exactly pigment be heated separately intensification), be equivalent to external layer pigment and serve an of short duration protective effect, and in this of short duration guard time, overall raw material has left discharging printhead to start to print, solidification, thus can ensure outer fully painted, coloring degree is high and stable.In addition, heat insulation cylinder yet forms both a barrier structure, when pigment enters tapping channel, there is certain impulsive force (it is need pressure that pigment is sent into), if directly painted, pigment is more easily mixed into and prints raw material inside, and had heat insulation cylinder, can ensure that pigment only can full and uniform in chrominance channel scattering at thin material, and carry out painted to the printing raw material that thin material in chrominance channel, fully save pigment, it also avoid final printing and expect that inner pigment content is too high.In addition, can be provided with heat insulation cooling airway in heat insulation cylinder, heat insulation cooling airway one end connects cooled exhaust pipe one end, and the heat insulation cooling airway other end connects cooling air inlet pipe one end, and the cooled exhaust pipe other end, the cooling air inlet pipe other end are all in outside discharging printhead.Thus, in the course of work, cooling air inlet pipe input cold gas can also be given, promote the effect of heat insulation of heat insulation cylinder further.
Embodiment 3: the basic structure of the present embodiment and embodiment are with embodiment 1, and its difference is:
As shown in Figure 8, described discharging printhead is provided with can the METAL HEATING PROCESS block 25 of electrified regulation, and a part for METAL HEATING PROCESS block stretches in tapping channel.This programme is applicable to solid material, and solid material enters by heating and melting after tapping channel, and then prints discharging, curing molding.This programme is also applicable to the form of post bake, namely in order to avoid fused raw material enter tapping channel after temperature drop too fast, utilize METAL HEATING PROCESS block secondary heating.
Embodiment 4: the basic structure of the present embodiment and embodiment are with embodiment 1 or 2 or 3, and its difference is:
As shown in Fig. 9, Figure 10, described printhead feed end is switched to the mixing discharge end of a mixing drum 6 by a feeding engine, mixing drum is provided with a charging aperture, also comprise some for the material tube to cylinder charging aperture feed, melting heater is provided with in material tube, mixing discharge end is provided with outlet valve, and be provided with the mixing axle 61a driven by hybrid electric motor 61 in described mixing drum, described mixing axle is provided with some agitation blades 61b.Hybrid electric motor is located at above mixing drum, and the output of hybrid electric motor connects the input of a mixing reductor 61c, and the output of mixing reductor to stretch in mixing drum and connects mixing axle.When adopting the direct charging of fused raw material, fused raw material, except single material, also can be compound, each solid-state single raw material melting or thawing in material tube, enter mixing drum, now mix axle and agitation blades just can be driven to stir, promote the uniformity of compound.
Described mixing drum cylindrically, mixing drum comprises stack shell 611, the cylinder end 612, cylinder top 613, cylinder charging aperture is located at cylinder top, mixing drum is located in a fixing tub 62, mixing drum and fixing tub are rotationally connected, the center of rotation of mixing drum is stack shell axis, also comprise a mair motor 63 for driving stack shell to rotate around stack shell axis, mixing discharge end be one with the drainage conduit 64 of fixing at the bottom of cylinder and the blow-off valve be located in drainage conduit, drainage conduit, mixing drum, mixing axle is all coaxial, feeding engine is connected by material receiving tube 65 and drainage conduit, drainage conduit and material receiving tube are rotationally connected, material receiving tube is fixed in fixing tub, at least four blocks of arc plates 66 are provided with in stack shell, arc plate outer surface can be fitted with stack shell interior sidewall surface, each arc plate is uniformly distributed along the circumference of mixing axle, space between adjacent arcs plate is side material passing passage, arc plate is provided with some sideslip bars 661, sideslip bar passes stack shell sidewall and is connected with stack shell side walls, sideslip bar outer end is in outside stack shell, sideslip bar outer end is provided with pressing plate 662, pressing plate is provided with balancing weight 663, some returning springs 664 are provided with between pressing plate and stack shell, returning spring one end connects pressing plate, the returning spring other end connects stack shell outer side surface.Feeding engine can select screw pump, and feeding engine import is connected to drainage conduit one end by material receiving tube, and it is outer and be rotationally connected with material receiving tube that the drainage conduit other end is enclosed within material receiving tube, and feeding engine outlet is switched to printhead feed end by printhead feeding pipe.Discharge sealing ring is provided with between drainage conduit and material receiving tube.Thus the sealing of height can be ensured when drainage conduit and material receiving tube relatively rotate.The output of mair motor connects the input of a main gear reducer 63a, the output of main gear reducer is provided with a driving pulley 63b, stack shell lateral wall is fixed with the annular driven belt wheel 63c coaxial with stack shell, the closed power belt 63d in first place walks around driving pulley and annular driven belt wheel, power belt tensioning.Described hybrid electric motor is fixed by support and fixing tub.Described stack shell is provided with some airtight and watertight padding blocks 665, and described airtight and watertight padding block and sideslip bar one_to_one corresponding, between described airtight and watertight padding block and corresponding sideslip bar, slipper seal coordinates.It is the common form that is sealed and matched that slipper seal coordinates, as being exactly that slipper seal coordinates between oil cylinder piston with cylinder wall.
Fixing tub maintains static, stack shell can rotate (mair motor drives stack shell to rotate by main gear reducer, driving pulley, power belt, annular driven belt wheel), mixing axle also can rotate, certainly, in practical operation, stack shell and mixing axle is preferably allowed to reversely rotate, if rotating Vortex, then velocity of rotation otherwise with, otherwise just become " geo-stationary ".We know, the cylindrical container of this class of mixing drum, in the process of carrying out batch mixing, the material of adherent (sidewall) is not easy to be stirred, and (in reality, stirring structure is difficult to accomplish adherent first, scrape the negative effect such as wall, aggravation vibrations because have, and the accuracy of manufacture requires too high; Have centrifugal action when second stirring, in compound, comparatively large, that viscosity the is higher material of quality is easily adherent, so the uniformity of compound still can be limited).Moreover, easily there is the problem such as lower leaf and heavy burder precipitation, be also unfavorable for the uniformity ensureing compound.And in this programme, there is arc plate structure, arc plate outer surface can be fitted with stack shell interior sidewall surface, under off working state, has surplus between arc plate and stack shell interior sidewall surface, and now returning spring is not also stretched.When operating (during stirring), mair motor drives stack shell to rotate, along with stack shell rotating speed promotes, under the influence of centrifugal force, the outside displacement of balancing weight becomes large (now returning spring elongation), drive arc plate near and is labelled to stack shell interior sidewall surface gradually, thus the compound at adherent place is upper and lower to arc plate, both sides can to extrude, come back to stack shell center.And again interior mobile to arc plate, only need mair motor to stop, or speed governing (reduction of speed), so under the return action of returning spring, arc plate will move inward.And in actual whipping process, agitation blades is stirred always, under the effect of agitation blades, internal mix material outwards moves (towards stack shell sidewall), and mair motor can accelerate through several times, slow down, or several times start, stop, when starting or after accelerating, arc plate promotes the compound at adherent place on arc plate, under, both sides are extruded, the compound upwards extruded is equivalent to move from the bottom to top, achieve the effect of will a part of bottom compound turn over, solve the problem of lower leaf and heavy burder precipitation on compound in passing, and the compound extruded to both sides, remaining adherent compound can be impacted (time as adherent in arc plate, adherent compound in Nei Ji side, space material passing passage between adjacent arcs plate, adherent compound is allowed again to be mixed into stack shell center, re-start stirring, therefore can ensure that compound has high uniformity.Compound after having stirred can input tapping channel and printing shaping immediately, and therefore the final quality printing material have also been obtained guarantee.
Claims (8)
1. a 3D printing device, comprise mainframe, discharging printhead, shaping stamp pad, also comprise one for driving discharging printhead to move thus changing the printhead displacement governor motion of discharging print head position, it is characterized in that, described discharging printhead is provided with for inputting the printhead feed end printing raw material, the tapping channel be communicated with printhead feed end is provided with in described discharging printhead, also comprise pigment bucket, delivery pump, delivery pump inlet communication pigment bucket, delivery pump outlet tapping channel.
2. a kind of 3D printing device according to claim 1, it is characterized in that, described delivery pump outlet is communicated with tapping channel by coloring structure, coloring structure comprises additive color endless tube, many of being located on additive color endless tube colour tube, additive color endless tube is coaxial with tapping channel, colour tube inlet communication additive color endless tube, colour tube outlet tapping channel, each colour tube is uniformly distributed along tapping channel circumference, and described additive color endless tube is communicated to delivery pump outlet by pigment transfer pipeline.
3. a kind of 3D printing device according to claim 1, it is characterized in that, described tapping channel is vertical and cylindrical, discharging printhead is located on a printing caster bed frame, described printhead displacement governor motion is a parallel institution, parallel institution comprises three side chains in parallel, side chain in parallel comprises two adjusting rods, a band motion block moving up and down, band motion block in same side chain in parallel and globular hinge between adjusting rod upper end, globular hinge between each adjusting rod lower end and printhead stand, three side chains in parallel are uniformly distributed along the circumference of tapping channel.
4. a kind of 3D printing device according to claim 1, it is characterized in that, described side chain in parallel also comprises side chain motor, vertical guide bar, transmission mechanism, transmission mechanism comprises driving wheel, driven pulley, walks around the driving belt of driving wheel and driven pulley, driving belt first place is closed, in same side chain in parallel:
The rotational power of driving wheel is from side chain motor, be slidably connected between band motion block and vertical guide bar, slidably direction with motion block is vertical, band motion block is provided with determines hole, hole alive, determine hole, Kong Jun alive runs through the band upper and lower surface of motion block, driving belt is through determining hole, hole alive, and driving belt is in the part of determining in hole and is fixedly connected with between band motion block.
5. a kind of 3D printing device according to claim 2, it is characterized in that, the heat insulation cylinder coaxial with tapping channel is provided with in described tapping channel, the equal opening of heat insulation cylinder upper and lower end, heat insulation cylinder is connected with discharging printhead by connecting rod, form thin material between heat insulation cylinder lateral wall and the conduit wall of tapping channel and chrominance channel, colour tube outlet towards heat insulation cylinder lateral wall, colour tube exit and be provided with painted check valve.
6. a kind of 3D printing device according to claim 1, is characterized in that, described discharging printhead is provided with can the METAL HEATING PROCESS block of electrified regulation, and a part for METAL HEATING PROCESS block stretches in tapping channel.
7. a kind of 3D printing device according to claim 1, it is characterized in that, described printhead feed end is switched to the mixing discharge end of a mixing drum by a feeding engine, mixing drum is provided with a charging aperture, also comprise some for the material tube to cylinder charging aperture feed, be provided with melting heater in material tube, mixing discharge end is provided with outlet valve, be provided with the mixing axle driven by hybrid electric motor in described mixing drum, described mixing axle is provided with some agitation blades.
8. a kind of 3D printing device according to claim 7, it is characterized in that, described mixing drum cylindrically, mixing drum comprises stack shell, the cylinder end, cylinder top, cylinder charging aperture is located at cylinder top, mixing drum is located in a fixing tub, mixing drum and fixing tub are rotationally connected, the center of rotation of mixing drum is stack shell axis, also comprise a mair motor for driving stack shell to rotate around stack shell axis, mixing discharge end be one with the drainage conduit of fixing at the bottom of cylinder and the blow-off valve be located in drainage conduit, drainage conduit, mixing drum, mixing axle is all coaxial, feeding engine is connected by material receiving tube and drainage conduit, drainage conduit and material receiving tube are rotationally connected, material receiving tube is fixed in fixing tub, at least four blocks of arc plates are provided with in stack shell, arc plate outer surface can be fitted with stack shell interior sidewall surface, each arc plate is uniformly distributed along the circumference of mixing axle, space between adjacent arcs plate is side material passing passage, arc plate is provided with some sideslip bars, sideslip bar passes stack shell sidewall and is connected with stack shell side walls, sideslip bar outer end is in outside stack shell, sideslip bar outer end is provided with pressing plate, pressing plate is provided with balancing weight, some returning springs are provided with between pressing plate and stack shell, returning spring one end connects pressing plate, the returning spring other end connects stack shell outer side surface.
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| CN105690773A (en) * | 2016-04-12 | 2016-06-22 | 张萍 | Intelligent high-precision 3D printer based on internet of things |
| CN106217865A (en) * | 2016-07-19 | 2016-12-14 | 冯思特 | Suspension cable type 3D print system |
| CN110891764A (en) * | 2017-03-15 | 2020-03-17 | 安斯百克特生物系统公司 | System and method for printing fibrous structures |
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| CN105437548B (en) | 2017-07-18 |
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