CN108656528B

CN108656528B - Three-dimensional printer of wholeness product

Info

Publication number: CN108656528B
Application number: CN201810459655.3A
Authority: CN
Inventors: 李小阳; 陈玉泳; 洪东华; 林巧云
Original assignee: Quanzhou Bilined Technology Co Ltd
Current assignee: Quanzhou Bilined Technology Co Ltd
Priority date: 2017-06-21
Filing date: 2017-06-21
Publication date: 2020-03-27
Anticipated expiration: 2037-06-21
Also published as: CN108715033A; CN108688147B; CN108715033B; CN108656528A; CN107297893B; CN108673877A; CN107297893A; CN108688147A; CN108673877B

Abstract

The invention provides a three-dimensional printer of an integral product, wherein molten raw materials respectively flow out from a third channel and a seventh channel; the heating part is used for heating the second far-away side wall, so that the heating inclined plane at the lower end has higher temperature, meanwhile, the heating part is used for further heating the raw materials in the auxiliary printing head, the temperature and the flowability of the raw materials in the auxiliary printing head are higher than those of the raw materials in the main printing head, the heating inclined plane is contacted with the lower printing layer which is cooled and solidified slightly, the upper surface of the lower printing layer can be melted, then, the raw material pad flowing out of the seventh channel is arranged between the raw materials flowing out of the third channel and the lower printing layer with the melted surface, the raw materials flowing out of the seventh channel play a role in gluing, and the raw materials flowing out of the third channel and the lower printing layer are naturally fused into a whole. The storage box can collect the raw materials that melts in heating the box and store, then beat printer head and vice printer head to the main simultaneously and carry out the feed, can ensure the continuity and the stability of feed.

Description

Three-dimensional printer of wholeness product

The patent application of the invention is a divisional application of a Chinese patent application No. 201710473914.3, the application No. of the original application is 201710473914.3, the application date is 2017, 06 and 21, and the name of the invention is a three-dimensional printer.

Technical Field

The invention relates to the field of three-dimensional printing machinery, in particular to a three-dimensional printer of an integral product.

Background

The three-dimensional Printer (3D Printer, 3DP for short) is a process of Rapid Prototyping (RP), and a three-dimensional model is manufactured layer by layer in a layer-by-layer stacking manner, and the operation process of the three-dimensional Printer is similar to that of a conventional Printer, except that the conventional Printer prints ink on paper to form a two-dimensional planar drawing, and the three-dimensional Printer stacks and superimposes liquid photosensitive resin materials, molten plastic wires, gypsum powder, metal powder and other materials layer by layer to form a three-dimensional entity by spraying a binder or extruding the like. The structure of a unit printer is known, for example, chinese patent 201310559350.7 discloses a fused deposition three-dimensional printing nozzle and a printer, wherein a fused deposition three-dimensional printing nozzle comprises a screw barrel, a nozzle, and a screw shaft, wherein the nozzle is installed at the lower part of the screw barrel, the screw shaft is installed in the screw barrel, the upper end of the screw shaft can be connected with a motor shaft through a coupling, a thread groove is opened on the lower half shaft, a branch pipe is opened at the upper part of the barrel body of the screw barrel for installing a plasticizing pipe for feeding threads, and heating devices are installed at the peripheries of the screw barrel and the branch pipe. The number of the branch pipes is three, and the branch pipes are uniformly arranged at the upper part of the barrel body of the screw machine barrel. The lower part of the screw machine barrel is provided with an external thread, the nozzle is provided with an internal thread matched with the external thread at the lower part of the screw machine barrel, and the nozzle is connected with the screw machine barrel in a thread matching way. And a thrust ball bearing and a bearing end cover are fixedly arranged in the top of the screw machine barrel, and the screw shaft penetrates through the thrust ball bearing and the bearing end cover. The heating device is composed of a heating sleeve and a thermistor, the silk material is melted by heat generated by the heating sleeve, the thermistor feeds back temperature information, and the whole heating device is a closed-loop temperature control system. The top of the screw machine barrel is provided with a through hole or a threaded hole for connecting with a printer. A fused deposition three-dimensional printer comprises the fused deposition three-dimensional printing spray head.

The invention can generate stable driving force to effectively push the molten silk material to be extruded from the nozzle, but in the actual use process, the invention is the same as other three-dimensional printers in the market, in the printing process of stacking raw materials layer by layer, the stacking of the upper printing layer and the lower printing layer has time difference, when the upper printing layer is laid on the lower printing layer, the lower printing layer is slightly cooled and solidified, the upper printing layer is only laid on the lower printing layer, an obvious joint surface exists, and the joint surface is caused by incomplete fusion of the upper printing layer and the lower printing layer, so that the three-dimensional printing finished product has poor integrity and is easy to break at the joint surface, and the three-dimensional printing finished product becomes one of important defects of the three-dimensional printing finished product.

Accordingly, the present inventors have made extensive studies to solve the above problems and have made the present invention.

Disclosure of Invention

The invention aims to provide a three-dimensional printer of an integrated product, which can carry out complete melting type integrated joint on adjacent printing layers, has strong and firmer printing finished product integrity and strong practicability.

In order to achieve the purpose, the invention adopts the following technical scheme:

a three-dimensional printer of an integral product comprises a printer main body and a printing head arranged on the printer main body; the printing head is arranged above the printing platform, is connected with the action device and is communicated with the discharge hole of the heating box; the printing head comprises a main printing head and an auxiliary printing head, the main printing head comprises a main discharging nozzle and a main feeding mechanism, the main discharging nozzle is positioned below the main printing head, the main feeding mechanism is used for feeding the main discharging nozzle downwards, and the auxiliary printing head comprises an auxiliary discharging nozzle and an auxiliary feeding mechanism, the auxiliary discharging nozzle is positioned below the auxiliary printing head, and the auxiliary feeding mechanism is used for feeding the auxiliary discharging nozzle downwards;

the main feeding mechanism comprises a main conveying shell extending up and down and a main conveying screw rod extending up and down and arranged in the main conveying shell; the main conveying shell comprises a first conveying main body section which is thick at the upper part, a first connecting section which is thin at the lower part and is connected with the main discharging nozzle, and a first transition section which is connected between the first conveying main body section and the first connecting section and is tapered from top to bottom; the first connecting section is provided with a first channel, the lower end of the first transition section is provided with a first through hole communicated with the upper end of the first channel, the main conveying screw is arranged in the first conveying main body section, the lower end of the main conveying screw is provided with a first blocking tip matched with the inner side surface of the first transition section and capable of blocking the first through hole, and the upper end of the main conveying screw is provided with a first rotating driving device for driving the main conveying screw to rotate and a first lifting driving device for driving the main conveying screw to lift; the main discharging nozzle comprises a second connecting section and a first discharging section, wherein the second connecting section is positioned above and connected with the lower end of the first connecting section, and the first discharging section is positioned below and gradually inclines to one side of the main conveying shell from top to bottom; the second connecting section is provided with a second channel communicated with the lower end of the first channel, and the first discharging section is provided with a third channel communicated with the lower end of the second channel;

the main conveying shell is provided with a first side corresponding to the lower end of the first discharging section in the direction of the lower end of the first discharging section and a second side opposite to the first side; the auxiliary feeding mechanism and the auxiliary discharging nozzle are positioned on the second side of the main conveying shell; the auxiliary feeding mechanism comprises an auxiliary conveying shell which extends up and down along the side wall of the main conveying shell, and an auxiliary conveying screw rod which extends up and down and is arranged in the auxiliary conveying shell; the auxiliary conveying shell comprises an auxiliary conveying channel positioned above, a fourth channel communicated with the lower end of the auxiliary conveying channel and gradually thinned from top to bottom, and a fifth channel communicated with the lower end of the fourth channel and gradually inclined and extended towards the first side of the main conveying shell from top to bottom; the lower end of the fourth channel is provided with a second through hole communicated with the upper end of the fifth channel, the auxiliary conveying screw is arranged in the auxiliary conveying channel, a second plugging tip matched with the inner side surface of the fourth channel and capable of plugging the second through hole is formed at the lower end of the auxiliary conveying screw, and a second rotation driving device for driving the auxiliary conveying screw to rotate and a second lifting driving device for driving the auxiliary conveying screw to lift are arranged at the upper end of the auxiliary conveying screw in a matching mode; the auxiliary discharging nozzle comprises a sixth channel communicated with the lower end of the fifth channel and a seventh channel communicated with the lower end of the sixth channel and gradually and obliquely extending towards the outlet direction of the third channel from top to bottom along the lower part of the first discharging section;

the auxiliary conveying shell is provided with a first common side wall and a first far side wall, wherein the first common side wall is shared with the main conveying shell, and the first far side wall is far away from the main conveying shell; the secondary tap has a second common sidewall that shares a sidewall with the first connecting section and the primary tap, and a second remote sidewall that is further from the first connecting section and the primary tap; the first far side wall comprises a first upper section wall corresponding to the secondary conveying channel and a first lower section wall corresponding to the fourth channel and the fifth channel; the second distal sidewall includes a second upper segment wall corresponding to the sixth channel and a second lower segment wall corresponding to the seventh channel; heating parts for heating the raw materials in the auxiliary printing head to enable the flowability of the raw materials in the auxiliary printing head to be larger than that of the raw materials in the main printing head are arranged in the first upper section wall, the first lower section wall, the second upper section wall and the second lower section wall; the second shared side wall comprises a lower end shared side wall positioned between the third channel and the seventh channel, and the lower end shared side wall becomes thinner gradually from top to bottom; a heating inclined plane which is inclined and extends towards the outlet direction of the seventh channel gradually from top to bottom is formed at the lower end of the second far side wall; the printing head further comprises a storage box which is located above the printing head, connected with the main conveying shell and the auxiliary conveying shell and used for storing and melting raw materials, and the storage box is communicated with the heating box.

At least the lower part of the heating inclined plane is provided with a plurality of heating spikes.

And a third heat-insulating layer is arranged in the side wall of the storage box.

After the technical scheme is adopted, the three-dimensional printer of the integrated product breaks through the structural form of the traditional three-dimensional printer, in the actual working process, the material is supplied to the heating box by the material supply device, the heating box heats and melts the material into fluid, the melted material enters the main printing head and the auxiliary printing head, the second side of the main conveying shell is taken as the front of horizontal walking, and the printing head is driven by the action device to enable the third channel and the seventh channel to face backwards to perform three-dimensional printing on the printing platform. Specifically, in an unprinted state, a first lifting driving device drives a main conveying screw to downwards enable a first plugging tip end to plug a first through hole, a second lifting driving device drives an auxiliary conveying screw to downwards enable a second plugging tip end to plug a second through hole, when printing is started, the main conveying screw ascends under the driving of the first lifting driving device, the first plugging tip end does not plug the first through hole, and a first rotating driving device drives the main conveying screw to downwards convey melted raw materials to sequentially pass through a first channel of a first connecting section and a third channel of a main discharging nozzle to flow out; meanwhile, under the driving of a second lifting driving device, the auxiliary conveying screw rod rises, the second plugging tip does not plug the second port, and a second rotating driving device drives the auxiliary conveying screw rod to convey the melted raw materials downwards to flow out through a fourth channel, a fifth channel, a sixth channel and a seventh channel in sequence and is padded below the raw materials flowing out from the third channel; the heating part heats the second far-side wall, so that the heating inclined plane at the lower end has higher temperature, and simultaneously, the heating part further heats the raw materials in the auxiliary printing head, so that the temperature and the liquidity of the raw materials in the auxiliary printing head are higher than those of the raw materials in the main printing head, namely, the temperature and the liquidity of the raw materials flowing out of the seventh channel are higher than those of the raw materials flowing out of the third channel, in the printing process, the heating inclined plane is contacted with the lower layer of the printing layer which is cooled and solidified slightly, so that the upper surface of the lower layer of the printing layer is melted, then the raw materials flowing out of the seventh channel are filled between the raw materials flowing out of the third channel and the lower layer of the printing layer with the melted surface, the raw materials flowing out of the seventh channel play a role of gluing, the raw materials flowing out of the third channel and the lower layer of the printing layer are naturally fused into a whole, the adjacent printing layers are jointed more firmly, meanwhile, the properties such as flowability and the like of the raw materials in the third channel of the main printing head serving as the main raw materials for forming the printed finished product are unchanged, the initial flowability and other design parameters of the main raw materials are not changed, and the condition that the quality is affected by deformation and the like of the printed finished product in the printing process is further ensured. When printing is finished, the first lifting driving device drives the main conveying screw to downwards enable the first plugging tip end to plug the first through hole, and the second lifting driving device drives the auxiliary conveying screw to downwards enable the second plugging tip end to plug the second through hole. The storage box can collect the raw materials that melts in heating the box and store, then beat printer head and vice printer head to the main simultaneously and carry out the feed, can ensure the continuity and the stability of feed. Compared with the prior art, the three-dimensional printer of the integral product can carry out complete melting type integral joint on the adjacent printing layers, and the printed finished product has strong integrity, is firmer and has strong practicability.

Drawings

FIG. 1 is a simplified structural diagram of the present invention;

FIG. 2 is a schematic view of the present invention in partial cross-section;

FIG. 3 is a partial sectional structural view illustrating a state of use of the present invention;

fig. 4 is a partial structural schematic diagram of the present invention.

In the figure:

1-printer body 11-printing platform 12-actuating device 13-heating box 14-feeding device 2-printing head

21-main printing head 211-main discharging nozzle 2111-second connecting section 21111-second channel 2112-first discharging section 21121-third channel 212-main feeding mechanism 2121-main conveying shell a 1-first conveying main body section a 2-first connecting section a 21-first channel a 3-first transition section a 31-first channel 2122-main conveying screw b 1-first blocking tip b 2-first rotation driving device b 21-first fixing part b 22-first gear b 3-first lifting driving device b 31-first horizontal driving plate b 32-first driving screw b 4-first driving rod b 41-first tooth section b 42-first annular groove

22-the sub-printhead 221-the sub-discharge nozzle 2211-the sixth channel 2212-the seventh channel 2213-the second common side wall 22131-the lower end common side wall 2214-the second far side wall e 1-the second upper section wall e 2-the second lower section wall e 3-the heating inclined plane e 31-the heating spike 222-the sub-feeding mechanism 2221-the sub-conveying shell c 1-the sub-conveying channel c 2-the fourth channel c 21-the second through opening c 3-the fifth channel c 4-the first common side wall c 41-the first heat preservation layer c 5-the first far side wall c 51-the first upper section wall c 52-the first lower section wall 2222-the sub-conveying screw d 1-the second blocking tip d 2-the second rotation driving device d 21-the second fixing part d 22-the second gear d 31-the second horizontal transmission plate d 5-the second horizontal transmission rod d 4-the second rotation driving device d 5857323-the second lifting driving device d 5-the second far side wall c 51-the first far side wall c 51-the second horizontal transmission rod c51 Second tooth segment d 42-second annular groove

23-a heating component 24-a second heat-insulation layer 25-a storage box 251-a third heat-insulation layer 26-a connecting plate.

Detailed Description

In order to further explain the technical solution of the present invention, the following detailed description is given by way of specific examples.

The three-dimensional printer of the integral product, as shown in fig. 1-4, comprises a printer body 1 and a printing head 2 arranged on the printer body 1.

The printer body 1 includes a printing platform 11, an actuating device 12 disposed above the printing platform 11 for actuating and driving the printing head 2, a heating box 13 disposed above the printing platform 11 for heating the raw material, and a feeding device 14 for feeding the heating box 13; the printing head 2 is arranged above the printing platform 11, is connected with the action device 12 and is communicated with a discharge hole of the heating box 13; the print head 2 comprises a main print head 21 and a sub print head 22, the main print head 21 comprises a main discharging nozzle 211 at the lower part and a main feeding mechanism 212 for feeding the main discharging nozzle 211 downwards, and the sub print head 22 comprises a sub discharging nozzle 221 at the lower part and a sub feeding mechanism 222 for feeding the sub discharging nozzle 221 downwards;

the main feeding mechanism 212 includes a main feeding housing 2121 extending upward and downward, and a main feeding screw 2122 extending upward and downward and disposed in the main feeding housing 2121; the main transporting housing 2121 includes a first transporting main body segment a1 which is thicker at the upper side, a first connecting segment a2 which is thinner at the lower side and connected with the main discharging nozzle 211, and a first transition segment a3 which is connected between the first transporting main body segment a1 and the first connecting segment a2 and is tapered from the top to the bottom; the first connecting section a2 has a first channel a21, the lower end of the first transition section a3 has a first through hole a31 communicated with the upper end of the first channel a21, the main conveying screw 2122 is arranged in the first conveying main body section a1, the lower end of the main conveying screw 2122 is provided with a first blocking tip b1 matched with the inner side surface of the first transition section a3 and capable of blocking the first through hole a31, and the upper end of the main conveying screw 2122 is provided with a first rotating driving device b2 for driving the main conveying screw 2122 to rotate and a first lifting driving device b3 for driving the main conveying screw 2122 to lift up and down; the main discharging nozzle 211 includes a second coupling section 2111 at an upper side coupled to a lower end of the first coupling section a2, and a first discharging section 2112 at a lower side and gradually inclined toward the main transporting housing 2121 side from the top to the bottom; the second connection section 2111 has a second passage 21111 communicating with the lower end of the first passage a21, and the first discharge section 2112 has a third passage 21121 communicating with the lower end of the second passage 21111;

the main conveyor housing 2121 has a first side corresponding to the lower end of the first discharge section 2112 toward and a second side opposite the first side; the secondary feed mechanism 222 and the secondary tap 221 are located on a second side of the primary feed housing 2121; the sub feeding mechanism 222 includes a sub conveying housing 2221 extending up and down along a side wall of the main conveying housing 2121, and a sub conveying screw 2222 extending up and down inside the sub conveying housing 2221; the sub transporting housing 2221 includes a sub transporting passage c1 at an upper side, a fourth passage c2 communicating with a lower end of the sub transporting passage c1 and tapered from up to down, and a fifth passage c3 communicating with a lower end of the fourth passage c2 and extending obliquely from up to down to the first side of the main transporting housing 2121; the lower end of the fourth channel c2 is provided with a second through hole c21 communicated with the upper end of the fifth channel c3, the secondary conveying screw 2222 is arranged in the secondary conveying channel c1, the lower end of the secondary conveying screw 2222 is provided with a second blocking tip d1 which is matched with the inner side surface of the fourth channel c2 and can block the second through hole c21, and the upper end of the secondary conveying screw 2222 is provided with a second rotation driving device d2 for driving the secondary conveying screw 2222 to rotate and a second lifting driving device d3 for driving the secondary conveying screw 2222 to lift up and down; the auxiliary discharging nozzle 221 includes a sixth passage 2211 communicated with the lower end of the fifth passage c3, and a seventh passage 2212 communicated with the lower end of the sixth passage 2211 and gradually extending obliquely from top to bottom along the lower part of the first discharging section 2112 toward the outlet direction of the third passage 21121;

the sub transport housing 2221 has a first common side wall c4 that shares a side wall with the main transport housing 2121, and a first distant side wall c5 that is distant from the main transport housing 2121; the secondary tap 221 has a second common sidewall 2213 that shares sidewalls with the first connecting section a2 and the primary tap 211, and a second distal sidewall 2214 that is further from the first connecting section a2 and the primary tap 211; the first distancing side wall c5 comprises a first upper section wall c51 corresponding to the secondary conveying channel c1, and a first lower section wall c52 corresponding to the fourth channel c2 and the fifth channel c 3; the second distant side wall 2214 includes a second upper-stage wall e1 corresponding to the sixth passage 2211, and a second lower-stage wall e2 corresponding to the seventh passage 2212; the first upper section wall c51, the first lower section wall c52, the second upper section wall e1 and the second lower section wall e2 are provided with a heating member 23 for heating the raw material in the sub print head 22 so that the fluidity of the raw material in the sub print head 22 is larger than that of the raw material in the main print head 21; the second common side wall 2213 comprises a lower common side wall 22131 positioned between the third channel 21121 and the seventh channel 2212, the lower common side wall is gradually thinned from top to bottom, the structure is convenient for the raw material flowing out of the seventh channel 2212 to gradually and naturally contact and fuse with the raw material flowing out of the third channel 21121, the combination effect is better, and the condition that the strength of a finished product is influenced by foam and the like is not easy to generate; the lower end of the second far side wall 2214 is formed with a heating inclined surface e3 which gradually extends from top to bottom in an inclined manner toward the outlet of the seventh passage 2212. In the actual working process of the invention, the material supplying device 14 supplies the raw material to the heating box 13, the heating box 13 heats and melts the raw material into fluid, the melted raw material enters the main printing head 21 and the auxiliary printing head 22, the second side of the main conveying shell 2121 is the front of the horizontal walking, and the printing head makes the third channel 21121 and the seventh channel 2212 face backwards to perform three-dimensional printing on the printing platform 11 under the driving of the action device 12. Specifically, in an unprinted state, the first elevation driving device b3 drives the main conveying screw 2122 to downwards enable the first blocking tip b1 to block the first through hole a31, the second elevation driving device d3 drives the sub conveying screw 2222 to downwards enable the second blocking tip d1 to block the second through hole c21, when printing is started, the main conveying screw 2122 ascends under the driving of the first elevation driving device b3, the first blocking tip b1 does not block the first through hole a31, and the first rotation driving device b2 drives the main conveying screw 2122 to convey the melted raw material downwards to sequentially pass through the first channel a21 of the first connecting section a2 and the third channel 21121 of the main discharging nozzle 211 to flow out; meanwhile, under the driving of the second lifting driving device d3, the auxiliary conveying screw 2222 ascends, the second plugging tip d1 does not plug the second through hole c21, the second rotating driving device d2 drives the auxiliary conveying screw 2222 to convey the melted raw materials downwards to flow out of the fourth channel c2, the fifth channel c3, the sixth channel 2211 and the seventh channel 2212 in sequence, and the melted raw materials are padded below the raw materials flowing out of the third channel 21121; the heating component 23 heats the second far-away side wall 2214, so that the heating inclined plane e3 at the lower end has a higher temperature, meanwhile, the heating component 23 further heats the raw material in the sub-printing head 22, so that the temperature and the flowability of the raw material in the sub-printing head 22 are higher than those of the raw material in the main printing head 21, namely, the temperature and the flowability of the raw material flowing out of the seventh channel 2212 are higher than those of the raw material flowing out of the third channel 21121, during the printing process, the heating inclined plane e3 is in contact with the lower layer of the printing layer which is cooled and solidified slightly, so that the upper surface of the lower layer of the printing layer can be melted, then the raw material pad flowing out of the seventh channel 2212 is between the raw material flowing out of the third channel 21121 and the lower layer of which the surface is melted, the raw material flowing out of the seventh channel 2212 plays a role of gluing, so that the raw material flowing out of, the obvious joint surface can not appear between the upper printing layer and the lower printing layer, the joint between the adjacent printing layers is firmer, meanwhile, the properties such as the flowability and the like of the raw materials in the third channel 21121 of the main printing head 21 serving as the main raw materials for forming the printed finished product can be ensured to be unchanged, the initial flowability and the like of the main raw materials are not changed, and the condition that the quality is influenced by the deformation and the like of the printed finished product in the printing process is further ensured to be difficult to appear. When printing is completed, the first elevation driving device b3 drives the main feed screw 2122 to move down so that the first blocking tip b1 blocks the first through opening a31, and the second elevation driving device d3 drives the sub feed screw 2222 to move down so that the second blocking tip d1 blocks the second through opening c 21. The specific structure may be that the print head is provided with a driving device for driving the print head to rotate, and the driving device can adjust the print head to rotate according to the horizontal traveling direction when the print head is used for printing, so that the third passage 21121 and the seventh passage 2212 face the rear direction. The heating member 23 may be an electric heating tube. Seventh passage 2212 may be particularly flat corresponding to the width of third passage 21121.

Preferably, the heating slope e3 is formed at least at a lower portion thereof with a plurality of heating spikes e 31. In the actual use process of the present invention, the heating spikes e31 may easily mark gullies on the upper surface of the lower printing layer, so as to increase the contact area between the upper surface of the lower printing layer and the heating inclined plane e3, so that the upper surface of the lower printing layer is more easily melted, and the raw material flowing out from the seventh channel 2212 is conveniently combined with the upper surface of the lower printing layer, so as to be fused together. The number and distribution arrangement of the heating spikes e31 can be adjusted and designed according to actual requirements.

Preferably, the included angles between the third channel 21121, the lower end common side wall 22131, the seventh channel 2212 and the heating inclined plane e3 and the horizontal plane become smaller in sequence, the structure can enable the main discharging nozzle 211 and the auxiliary discharging nozzle 221 to gather from top to bottom, so that the raw material flowing out of the third channel 21121 can be more conveniently contacted and combined with the raw material flowing out of the seventh channel 2212, and the included angle between the third channel 21121 and the horizontal plane is 15-30 degrees, the specific angle can be 15, 20, 25 or 30 degrees, the arrangement of the inclined angle is more convenient for the raw material in the third channel 21121 to flow out and lay on the raw material flowing out from the seventh channel 2212, the included angle between the heating inclined plane e3 and the horizontal plane is 5-15 degrees, the specific angle can be 5, 8, 10, 13 or 15 degrees, the arrangement of the inclined angle is more convenient for the heating inclined plane e3 to be in direct contact with the lower printing layer, the effective heating area is large enough, and the upper surface of the lower printing layer can be more conveniently melted.

Preferably, a first heat insulation layer c41 is provided in the first common side wall c4, and a second heat insulation layer 24 is provided outside the main transporting housing 2121 and the sub-transporting housing 2221. In the actual use process of the invention, the first heat-preserving and heat-insulating layer c41 can prevent the heat of the heating component 23 of the sub-printing head 22 from being transferred to the raw material in the main printing head 21, prevent the normal design flowability of the raw material in the main printing head 21 from being influenced, and further ensure the quality of the finished product; the second heat-insulating layer 24 can ensure the overall heat-insulating effect of the whole main printing head 21 and the whole auxiliary printing head 22, and can effectively protect external objects, and at least can not scald workers.

Preferably, the printhead further includes a magazine 25 connected to the main and sub conveyance housings 2121 and 2221 at an upper portion for storing the melted raw material, the magazine 25 communicating with the heating cartridge 13. In the practical use process of the present invention, the storage box 25 can collect and store the melted raw material in the heating box 13, and then supply the main printing head 21 and the sub printing head 22 simultaneously, so as to ensure the continuity and stability of the supply.

Preferably, a third thermal insulation layer 251 is arranged in the side wall of the storage box 25. In the practical use process of the present invention, the third thermal insulation layer 251 can ensure the thermal insulation effect of the storage box 25, so as to ensure that the melted raw material flowing from the heating box 13 has the temperature and the fluidity meeting the requirements in the storage box 25.

In order to realize the transmission of the main conveying screw 2122 and the secondary conveying screw 2222, it is preferable that a connecting plate 26 is disposed above the magazine 25, a first transmission rod b4 extending upward to penetrate above the connecting plate 26 is disposed at the upper end of the main conveying screw 2122, the main conveying screw 2122 is transmitted by the first rotation driving device b2 and the first lifting driving device b3 through the first transmission rod b4, a second transmission rod d4 extending upward to penetrate above the connecting plate 26 is disposed at the upper end of the secondary conveying screw 2222, and the secondary conveying screw 2222 is transmitted by the second rotation driving device d2 and the second lifting driving device d3 through the second transmission rod d 4.

Preferably, the first rotation driving device b2 and the second rotation driving device d2 are both motors with output ends facing downwards and arranged on the upper surface of the connecting plate 26, and the first lifting driving device b3 and the second lifting driving device d3 are both motors with output ends facing upwards and arranged on the upper surface of the connecting plate 26; the first rotary driving device b2 is fixed on the connecting plate 26 through a first fixing part b21, and the second rotary driving device d2 is fixed on the connecting plate 26 through a second fixing part d 21;

the output end of the first rotary driving device b2 is coaxially and fixedly connected with a first gear b22, and the upper end peripheral surface of the first transmission rod b4 is provided with a first tooth section b41 matched with the first gear b 22; the output end of the second rotary driving device d2 is coaxially and fixedly connected with a second gear d22, and the upper end peripheral surface of the second transmission rod d4 is provided with a second gear section d41 matched with the second gear d 22;

the output end of the first lifting driving device b3 carries out lifting transmission on the first driving rod b4 through a first horizontal driving plate b31, the output end of the first lifting driving device b3 is coaxially and fixedly connected with a first driving screw b32, a first threaded hole matched with the first driving screw b32 is formed in the first horizontal driving plate b31, and a first annular groove b42 for the first horizontal driving plate b31 to extend into is formed on the peripheral surface of the upper end of the first driving rod b 4; the output end of the second lifting driving device d3 carries out lifting transmission on the second transmission rod d4 through a second horizontal transmission plate d31, the output end of the second lifting driving device d3 is coaxially and fixedly connected with a second transmission screw d32, the second horizontal transmission plate d31 is provided with a second threaded hole matched with the second transmission screw d32, and the upper end peripheral surface of the second transmission rod d4 is provided with a second annular groove d42 for the second horizontal transmission plate d31 to extend into. In the practical use process of the invention, the first rotary driving device b2 is matched with a first tooth section b41 with a plurality of vertical strip-shaped teeth at the upper end of a first transmission rod b4 through a first gear b22 to drive the first transmission rod b4 to rotate, and a first transmission rod b4 drives a main conveying screw 2122 to rotate; the second rotary driving device d2 is matched with a second tooth section d41 with a plurality of vertical strip-shaped teeth at the upper end of a second transmission rod d4 through a second gear d22 to rotationally drive the second transmission rod d4, and the second transmission rod d4 drives the auxiliary conveying screw 2222 to rotate; the first lifting driving device b3 drives the first horizontal driving plate b31 to lift through the first driving screw b32, the first horizontal driving plate b31 drives the first driving rod b4 to lift through being clamped into the first annular groove b42 at the upper end of the first driving rod b4, because the first annular groove b42 is annular around one circle, the rotation of the first driving rod b4 does not affect the clamping relation between the first horizontal driving plate b31 and the first annular groove b42, the first gear b22 is matched with the first tooth section b41 through the strip-shaped teeth extending up and down, and the lifting of the first driving rod b4 does not affect the matching relation between the first gear b22 and the first tooth section b 41; the second lifting driving device d3 drives the second horizontal driving plate d31 to lift through the second driving screw d32, the second horizontal driving plate d31 drives the second driving rod d4 to lift through being clamped into the second annular groove d42 at the upper end of the second driving rod d4, because the second annular groove d42 is annular around one circle, the rotation of the second driving rod d4 does not affect the clamping relationship between the second horizontal driving plate d31 and the second annular groove d42, the second gear d22 is matched with the second tooth section d41 through the strip-shaped teeth extending up and down, and the lifting of the second driving rod d4 does not affect the matching relationship between the second gear d22 and the second tooth section d 41.

The product form of the present invention is not limited to the embodiments and examples shown in the present application, and any suitable changes or modifications of the similar ideas should be made without departing from the patent scope of the present invention.

Claims

1. A three-dimensional printer of an integral product comprises a printer main body and a printing head arranged on the printer main body; the printing head is arranged above the printing platform, is connected with the action device and is communicated with the discharge hole of the heating box; the printing head comprises a main printing head and an auxiliary printing head, the main printing head comprises a main discharging nozzle and a main feeding mechanism, the main discharging nozzle is positioned below the main printing head, the main feeding mechanism is used for feeding the main discharging nozzle downwards, and the auxiliary printing head comprises an auxiliary discharging nozzle and an auxiliary feeding mechanism, the auxiliary discharging nozzle is positioned below the auxiliary printing head, and the auxiliary feeding mechanism is used for feeding the auxiliary discharging nozzle downwards; the method is characterized in that:

2. The three-dimensional printer of one integral product of claim 1, wherein: at least the lower part of the heating inclined plane is provided with a plurality of heating spikes.

3. The three-dimensional printer of the unitary product of claim 2, further comprising: and a third heat-insulating layer is arranged in the side wall of the storage box.