阅读说明：本技术 一种可混合材料的3d打印喷头组件 (3D printing nozzle assembly capable of mixing materials ) 是由 刘葳兴 魏令 张之阳 李宁宇 于 2021-08-04 设计创作，主要内容包括：本发明涉及3D打印设备技术领域,具体涉及一种可混合材料的3D打印喷头组件,包括挤出机,挤出机顶面右端连通有PLA耗材,挤出机顶面左端连通有TPU耗材,挤出机内部呈左右对称结构设有两个挤压杆,挤压杆上呈上下对称结构套设有两个弹簧,挤压杆外端呈左右对称结构套设有两个继电器。本发明通过使用PLA耗材与TPU耗材进行混合打印,刚性与韧性介于PLA耗材与TPU耗材之间,使材料不会太硬同时也不会太软,可适用于生产如护腰甲板等零件,通过扩链剂管方便了扩链剂进入Y型喉管内部,有效改善了两种材料混合时的相容性,显著提升了零件的性能,通过挤压杆上下两侧的弹簧,提高了耗材从喷头杆出料时的流畅度,保证了出料的稳定性。(The invention relates to the technical field of 3D printing equipment, in particular to a 3D printing nozzle assembly capable of mixing materials. According to the invention, the PLA consumable material and the TPU consumable material are used for mixed printing, the rigidity and the toughness are between those of the PLA consumable material and the TPU consumable material, so that the materials are not too hard and not too soft, the method is suitable for producing parts such as waist support decks and the like, the chain extender pipe facilitates the chain extender to enter the Y-shaped throat pipe, the compatibility of the two materials during mixing is effectively improved, the performance of the parts is obviously improved, the smoothness of the consumable material during discharging from the spray head rod is improved through the springs on the upper side and the lower side of the extrusion rod, and the stability of discharging is ensured.)

1. The utility model provides a 3D of miscible material prints shower nozzle subassembly which characterized in that: including extruder (14), extruder (14) top surface right-hand member intercommunication has PLA consumptive material (1), extruder (14) top surface left end intercommunication has TPU consumptive material (2), extruder (14) inside bilateral symmetry structure that is equipped with two stripper bars (5), be about symmetrical structure cover is equipped with two springs (3) on stripper bar (5), stripper bar (5) outer end is bilateral symmetry structure cover and is equipped with two relays (4), bearing (6) have been cup jointed at stripper bar (5) inner middle part, extruder (14) inside left end cover has been cup jointed and has been extrudeed from driving wheel (7), extruder (14) inside right-hand member cover is equipped with extrusion action wheel (8), stripper bar (5) lower extreme is bilateral symmetry structure and has cup jointed two pipelines (15).

2. A mixable material 3D print head assembly as claimed in claim 1, wherein: a radiator (10) is arranged below the extruder (14), a Y-shaped throat pipe (9) is sleeved inside the radiator (10), a threaded hole (16) is formed in the middle of the right wall of the Y-shaped throat pipe (9), and the lower end of the Y-shaped throat pipe (9) is communicated with a heating main body (12).

3. A mixable material 3D print head assembly as claimed in claim 2, wherein: y type choke (9) middle part right side is equipped with chain extender pipe (11), heating main part (12) bottom surface has set firmly shower nozzle pole (13), shower nozzle pole (13) are linked together with heating main part (12), the external screw thread has been seted up to chain extender pipe (11) left end outer wall, chain extender pipe (11) are through external screw thread and screw hole (16) threaded connection.

4. A mixable material 3D print head assembly as claimed in claim 3, wherein: PLA consumptive material (1) respectively with bearing (6) and the extrusion action wheel (8) frictional contact that are located the right-hand member, TPU consumptive material (2) respectively with bearing (6) and the extrusion from driving wheel (7) frictional contact that are located the left end, PLA consumptive material (1) and TPU consumptive material (2) all pass extruder (14) and are linked together with pipeline (15), pipeline (15) lower extreme is linked together with Y type choke (9) upper end.

5. The material-mixable 3D printing head assembly of claim 4, wherein: the included angle of the middle part of the Y-shaped throat pipe (9) is larger than 135 degrees, the inner wall of the lower end of the Y-shaped throat pipe (9) is coated with a Teflon anti-sticking coating, the wall thickness of the Y-shaped throat pipe (9) is 3mm-5mm, and the threaded holes (16) are connected through external bolts in a threaded mode.

6. The material-mixable 3D printing head assembly of claim 5, wherein: the center pin of bearing (6) is connected fixedly with the inside back wall of extruder (14), extrude from driving wheel (7) and extrusion action wheel (8) and all pass extruder (14) inner wall and extend to the outside, extrusion action wheel (8) and extrusion are followed driving wheel (7) friction drive.

7. The material-mixable 3D printing head assembly of claim 6, wherein: the rigidity and the toughness of the PLA consumable part (1) and the TPU consumable part (2) are between those of the PLA and the TPU, the feeding speed of the PLA consumable part (1) and the feeding speed of the TPU consumable part (2) are 0.5-5mm/s, the heating temperature of the PLA consumable part (1) and the TPU consumable part (2) during mixed printing is 150-200 ℃, and the printing temperature is independently selected according to the type of the consumable part by using a single consumable part mode.

8. A mixable material 3D print head assembly as claimed in claim 7, wherein: the feeding speed of the chain extender pipe (11) for conveying the chain extender solution is 5-20ml/min, and the chain extender is selected from ADR-4370S or MDI and other materials.

Technical Field

The invention relates to the technical field of 3D printing equipment, in particular to a 3D printing nozzle assembly capable of mixing materials.

Background

3D prints as the emerging technique of 21 century since, receive more and more attention, its printing shaping mode is with the most common FDM, SLA, 3DP etc. are most common, FDM shaping mode is the fused deposition formula, heat the consumptive material to mobile form, through the continuous joining of consumptive material, improve the molding cavity internal pressure, constantly extrude the material after the melting, the required part of one deck is piled up and the shaping, because its principle is simple, advantages such as equipment easy maintenance, its application is comparatively extensive. PLA is a degradable and reproducible novel material, does not produce toxic and harmful substances in the production process, is relatively environment-friendly, is one of the most commonly used consumable materials of FDM type 3D printing equipment, but the produced part does not have good toughness, but needs to have certain toughness when producing certain parts, such as waist support decks and the like, and another material TPU which is opposite to the PLA is a material which has good performance and excellent biocompatibility and has higher toughness, but the produced part is softer, so equipment is needed, a method can be used, and the two materials are mixed and printed at the same time, so that the material which has certain rigidity and certain toughness is obtained, and the existing technical problem is solved.

In the prior art, when two materials of PLA and TPU in a 3D printing and forming mode are used, parts produced by the PLA have high rigidity but poor toughness, parts produced by the TPU have low rigidity but high toughness, and parts with certain rigidity and certain toughness cannot be produced, so that equipment or a method is needed, and the two materials are mixed and printed at the same time, so that the existing technical problem is solved.

Disclosure of Invention

In order to solve the problems, the invention provides a 3D printing spray head assembly capable of mixing materials.

In order to achieve the above object, the present invention adopts the following technical solutions:

the utility model provides a 3D who can mix material prints shower nozzle subassembly, which comprises an extruder, extruder top surface right-hand member intercommunication has the PLA consumptive material, extruder top surface left end intercommunication has the TPU consumptive material, the inside bilateral symmetry structure that is of extruder is equipped with two stripper bars, be the upper and lower symmetrical structure cover on the stripper bar and be equipped with two springs, the stripper bar outer end is bilateral symmetry structure cover and is equipped with two relays, the bearing has been cup jointed at the middle part of the stripper bar inner, the inside left end of extruder has cup jointed the extrusion from the driving wheel, the inside right-hand member cover of extruder is equipped with the extrusion action wheel, the stripper bar lower extreme is bilateral symmetry structure and has cup jointed two pipelines.

Preferably, a radiator is arranged below the extruder, a Y-shaped throat pipe is sleeved inside the radiator, a threaded hole is formed in the middle of the right wall of the Y-shaped throat pipe, and the lower end of the Y-shaped throat pipe is communicated with a heating main body.

Preferably, Y type choke middle part right side is equipped with the chain extender pipe, and heating main part bottom surface has set firmly the shower nozzle pole, and the shower nozzle pole communicates with the heating main part mutually, and the external screw thread has been seted up to chain extender pipe left end outer wall, and the chain extender pipe passes through external screw thread and screw hole threaded connection.

Preferably, the PLA consumptive material respectively with be located the bearing of right-hand member and extrusion action wheel frictional contact, the TPU consumptive material respectively with be located the bearing of left end and extrude from driving wheel frictional contact, PLA consumptive material and TPU consumptive material all pass the extruder and are linked together with the pipeline, the pipeline lower extreme is linked together with Y type choke upper end.

Preferably, the included angle of the middle part of the Y-shaped throat pipe is larger than 135 degrees, the inner wall of the lower end of the Y-shaped throat pipe is coated with a Teflon anti-sticking coating, the wall thickness of the Y-shaped throat pipe is 3mm-5mm, and the threaded holes are connected through external bolts in a threaded mode.

Preferably, the central shaft of the bearing is fixedly connected with the rear wall inside the extruder, the extrusion driven wheel and the extrusion driving wheel both penetrate through the inner wall of the extruder and extend to the outside, and the extrusion driving wheel and the extrusion driven wheel are in friction transmission.

Preferably, the rigidity and the toughness of the PLA consumable material and the TPU consumable material are between those of the PLA and the TPU, the feeding speed of the PLA consumable material and the TPU consumable material is 0.5-5mm/s, the heating temperature of the PLA consumable material and the TPU consumable material during mixed printing is 150-200 ℃, and the printing temperature is independently selected by using a single consumable material mode according to the type of the consumable material.

Preferably, the feeding speed of the chain extender pipe for conveying the chain extender solution is 5-20ml/min, and the chain extender is selected from ADR-4370S or MDI and other materials.

Due to the adoption of the technical scheme, the invention has the beneficial effects that:

1. according to the invention, the PLA consumable material and the TPU consumable material are mixed and printed, so that the rigidity and toughness of the material are between those of the PLA consumable material and the TPU consumable material, the material is not too hard and not too soft, and the material is suitable for producing parts such as waist support decks and the like.

2. When two paths of materials use the same consumable material, the invention can print some large parts, and can realize the effect of consumable material connection and uninterrupted printing through the control of the relay in the printing process.

3. According to the invention, the chain extender pipe is in threaded connection with the threaded hole, so that the chain extender can conveniently enter the Y-shaped throat pipe through the chain extender pipe, the compatibility of two materials during mixing is effectively improved, and the performances of consumable materials and parts production are obviously improved.

4. The springs on the upper side and the lower side of the extrusion rod effectively avoid the phenomenon of micro slippage caused by insufficient friction force of consumables during feeding due to over-small force of the springs on the extrusion rod, improve the smoothness of the consumables discharged from the nozzle rod, and ensure the stability of discharge.

5. The extrusion rod and the shell of the extruder are connected by the bearing, so that the phenomenon that the extrusion rod is blocked in the shell of the extruder in the moving process due to insufficient precision is avoided, and external dust is effectively prevented from entering the shell.

6. When the large model is printed, the manual operation of the machine is not required to be suspended for replacing the wire, the whole operation process is automatically realized, time and labor are saved, and the printing machine is convenient and quick.

7. The spray head rod is simple in structure and convenient to use, dust and impurities cannot be generated inside the spray head rod to influence normal use of the spray head rod during working, printing precision is improved, and meanwhile, printing effect is guaranteed.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only for the present invention and protect some embodiments, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural view of a showerhead assembly of the present invention;

FIG. 3 is a top view of the Y-shaped throat structure of the present invention in cross-section.

The reference numbers in the figures illustrate: 1. PLA consumables; 2. TPU consumables; 3. a spring; 4. a relay; 5. an extrusion stem; 6. a bearing; 7. extruding the driven wheel; 8. extruding the driving wheel; 9. a Y-shaped throat; 10. a heat sink; 11. a chain extender tube; 12. heating the body; 13. a nozzle rod; 14. an extruder; 15. a pipeline; 16. a threaded bore.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.

As shown in fig. 1-3, a 3D printing nozzle assembly of miscible material, including extruder 14, 14 top surfaces right-hand member intercommunication of extruder has PLA consumptive material 1, 14 top surfaces left end intercommunication of extruder has TPU consumptive material 2, 14 inside bilateral symmetry structure that is of extruder is equipped with two stripper bars 5, be the upper and lower symmetrical structure cover on the stripper bar 5 and be equipped with two springs 3, 5 outer ends of stripper bar are bilateral symmetry structure cover and are equipped with two relays 4, 5 inner middle parts of stripper bar have cup jointed bearing 6, 14 inside left ends of extruder have cup jointed the extrusion from driving wheel 7, 14 inside right-hand member cover of extruder is equipped with extrusion action wheel 8, 5 lower extremes of stripper bar are bilateral symmetry structure and have cup jointed two pipelines 15.

A radiator 10 is arranged below the extruder 14, a Y-shaped throat pipe 9 is sleeved in the radiator 10, a threaded hole 16 is formed in the middle of the right wall of the Y-shaped throat pipe 9, and the lower end of the Y-shaped throat pipe 9 is communicated with a heating main body 12.

Chain extender pipe 11 is equipped with on the right side in the middle part of Y type choke 9, and heating body 12 bottom surface has set firmly shower nozzle pole 13, and shower nozzle pole 13 is linked together with heating body 12, and the external screw thread has been seted up to 11 left end outer walls of chain extender pipe, and chain extender pipe 11 passes through external screw thread and 16 threaded connection of screw hole.

PLA consumptive material 1 respectively with be located the bearing 6 and the extrusion action wheel 8 frictional contact of right-hand member, TPU consumptive material 2 respectively with be located the bearing 6 and the extrusion of left end from driving wheel 7 frictional contact, PLA consumptive material 1 and TPU consumptive material 2 all pass extruder 14 and are linked together with pipeline 15, and 15 lower extremes of pipeline are linked together with the 9 upper ends of Y type choke.

The included angle of the middle part of the Y-shaped throat pipe 9 is larger than 135 degrees, the inner wall of the lower end of the Y-shaped throat pipe 9 is coated with a Teflon anti-sticking coating, the wall thickness of the Y-shaped throat pipe 9 is 3mm-5mm, and the threaded holes 16 are connected through external bolts in a threaded mode.

The central shaft of the bearing 6 is fixedly connected with the inner rear wall of the extruder 14, the extrusion driven wheel 7 and the extrusion driving wheel 8 both penetrate through the inner wall of the extruder 14 and extend to the outside, and the extrusion driving wheel 8 and the extrusion driven wheel 7 are in friction transmission.

The rigidity and the toughness of the PLA consumable part 1 and the TPU consumable part 2 are between those of the PLA and the TPU, the feeding speed of the PLA consumable part 1 and the TPU consumable part 2 is 0.5-5mm/s, the heating temperature of the PLA consumable part 1 and the TPU consumable part 2 during mixed printing is 150-200 ℃, and the printing temperature in a single consumable part mode is independently selected according to the type of the consumable part.

The feeding speed of the chain extender pipe 11 for conveying the chain extender solution is 5-20ml/min, and the chain extender is selected from ADR-4370S or MDI and other materials.

The working principle of the invention is that when the invention is used, firstly, an external motor is arranged on the rear wall of an extruder 14, an extrusion driving wheel 8 is driven by the external motor to rotate and frictionally transmit to an extrusion driven wheel 7 to synchronously rotate, the extrusion driven wheel 7 frictionally transmits a TPU consumable 2 to enable the TPU consumable 2 to be transmitted to a pipeline 15, the extrusion driving wheel 8 frictionally transmits the PLA consumable 1 to the pipeline 15, when the PLA consumable 1 and the TPU consumable 2 are transmitted, a relay 4 controls an extrusion rod 5 and a bearing 6 to respectively and synchronously move, the independent and synchronous feeding amount of the PLA consumable 1 and the TPU consumable 2 is controlled, the PLA consumable 1 and the TPU consumable 2 enter the pipeline 15 and then are transmitted to the interior of a Y-shaped throat pipe 9 to be fused, the fused PLA consumable 1 and the TPU consumable 2 are radiated by a radiator 10, and a chain extender is supplied to the Y-shaped throat pipe 9 through the threaded connection of a chain extender pipe 11 and a threaded hole 16 to improve the compatibility of the two materials, when the printing is not needed, the PLA consumable material 1 and the TPU consumable material 2 are connected with the thread hole 16 through the external bolt in a threaded manner to be sealed, so that dust is prevented from entering and leaking, the Y-shaped throat pipe 9 conveys the mixed PLA consumable material 1 and TPU consumable material 2 into the heating main body 12 to be heated, the nozzle rod 13 is used for mixed printing, when the mixed printing is needed, one path of feeding consumable material is the PLA consumable material 1, the other path of feeding consumable material is the TPU consumable material 2, the relays 4 at the left end and the right end are simultaneously powered off, if one path of the consumable material is interrupted, the relays 4 at the two sides are simultaneously powered on to stop printing, finally, a material with rigidity and toughness between the consumable material 1 and the TPU consumable material 2 can be obtained through mixed printing, when the independent printing is needed, the two paths of feeding consumable materials are the same consumable material, the simultaneous printing of a large model can be realized, one path of the consumable material is powered off, and the other path of the consumable material is powered off, if the consumable material is interrupted in the printing process, then this way consumptive material is electrified, and another way consumptive material loses the electricity, has realized that the consumptive material continues, the effect of incessant printing.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.